fix: types field

Author: antfu

examples/@vue-demi/use-mouse/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
-  "typings": "dist/esm/index.d.ts",
+  "types": "dist/esm/index.d.ts",
   "license": "MIT",
   "dependencies": {
     "vue-demi": "latest"

package.json

@@ -9,7 +9,7 @@
   "jsdelivr": "lib/index.iife.js",
   "unpkg": "lib/index.iife.js",
   "module": "lib/index.esm.js",
-  "typings": "lib/index.d.ts",
+  "types": "lib/index.d.ts",
   "exports": {
     ".": {
       "import": "./lib/index.esm.js",