Upgrade

.babelrc

@@ -1,4 +1,19 @@
 {
-  "presets": ["flow", "es2015"],
-  "comments": false
+  "presets": [
+    "flow",
+    ["env", { "modules": false, "loose": true }]
+  ],
+  "comments": false,
+  "env": {
+    "cjs": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    },
+    "test": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    }
+  }
 }

.eslintrc

@@ -4,13 +4,18 @@
   ],
   "parser": "babel-eslint",
   "plugins": [
-    "jest"
+    "jest",
+    "flowtype"
   ],
   "env": {
-    "es6": true,
+    "node": true,
     "browser": true,
+    "es6": true,
     "jest/globals": true
   },
+  "globals": {
+    "AnimationFrameID": true
+  },
   // custom rules
   "rules": {
     // http://eslint.org/docs/rules/quotes.html
@@ -132,6 +137,8 @@
     "indent": [
       "error",
       2
-    ]
+    ],
+    // Require // @flow at the top of files
+    "flowtype/require-valid-file-annotation": ["error", "always", { "annotationStyle": "line" }]
   }
 }

.gitignore

@@ -9,4 +9,5 @@ node_modules/
 .DS_Store
 
 # generated files
-lib/
+lib/
+esm/

flow-typed/npm/babel-cli_vx.x.x.js

@@ -0,0 +1,108 @@
+// flow-typed signature: d8044ea585ac81bc8bde751918bbb405
+// flow-typed version: <<STUB>>/babel-cli_v6.26.0/flow_v0.68.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'babel-cli'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'babel-cli' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'babel-cli/bin/babel-doctor' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel-external-helpers' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/_babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel-external-helpers' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/dir' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/file' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/index' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/util' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'babel-cli/bin/babel-doctor.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-doctor'>;
+}
+declare module 'babel-cli/bin/babel-external-helpers.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-external-helpers'>;
+}
+declare module 'babel-cli/bin/babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-node'>;
+}
+declare module 'babel-cli/bin/babel.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel'>;
+}
+declare module 'babel-cli/index' {
+  declare module.exports: $Exports<'babel-cli'>;
+}
+declare module 'babel-cli/index.js' {
+  declare module.exports: $Exports<'babel-cli'>;
+}
+declare module 'babel-cli/lib/_babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/lib/_babel-node'>;
+}
+declare module 'babel-cli/lib/babel-external-helpers.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel-external-helpers'>;
+}
+declare module 'babel-cli/lib/babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel-node'>;
+}
+declare module 'babel-cli/lib/babel/dir.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/dir'>;
+}
+declare module 'babel-cli/lib/babel/file.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/file'>;
+}
+declare module 'babel-cli/lib/babel/index.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/index'>;
+}
+declare module 'babel-cli/lib/babel/util.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/util'>;
+}

flow-typed/npm/babel-eslint_vx.x.x.js

@@ -0,0 +1,123 @@
+// flow-typed signature: 7f4a40c0dac1084e3855ae2df23b0f91
+// flow-typed version: <<STUB>>/babel-eslint_v8.2.2/flow_v0.68.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'babel-eslint'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'babel-eslint' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'babel-eslint/lib/analyze-scope' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/attachComments' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/convertComments' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/convertTemplateType' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/index' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/toAST' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/toToken' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/babylon-to-espree/toTokens' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/index' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/parse-with-patch' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/parse-with-scope' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/parse' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/patch-eslint-scope' {
+  declare module.exports: any;
+}
+
+declare module 'babel-eslint/lib/visitor-keys' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'babel-eslint/lib/analyze-scope.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/analyze-scope'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/attachComments.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/attachComments'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/convertComments.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/convertComments'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/convertTemplateType.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/convertTemplateType'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/index.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/index'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/toAST.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/toAST'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/toToken.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/toToken'>;
+}
+declare module 'babel-eslint/lib/babylon-to-espree/toTokens.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/babylon-to-espree/toTokens'>;
+}
+declare module 'babel-eslint/lib/index.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/index'>;
+}
+declare module 'babel-eslint/lib/parse-with-patch.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/parse-with-patch'>;
+}
+declare module 'babel-eslint/lib/parse-with-scope.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/parse-with-scope'>;
+}
+declare module 'babel-eslint/lib/parse.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/parse'>;
+}
+declare module 'babel-eslint/lib/patch-eslint-scope.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/patch-eslint-scope'>;
+}
+declare module 'babel-eslint/lib/visitor-keys.js' {
+  declare module.exports: $Exports<'babel-eslint/lib/visitor-keys'>;
+}

flow-typed/npm/babel-jest_vx.x.x.js

@@ -0,0 +1,32 @@
+// flow-typed signature: 100e5dd8a65cdcdd5a36207aa692f82d
+// flow-typed version: <<STUB>>/babel-jest_v^22.4.3/flow_v0.68.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'babel-jest'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'babel-jest' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'babel-jest/build/index' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'babel-jest/build/index.js' {
+  declare module.exports: $Exports<'babel-jest/build/index'>;
+}