modernize dependencies

.travis.yml

@@ -1,4 +1,4 @@
 language: node_js
 node_js:
-  - "8"
+  - "10"
   - "node"

package.json

@@ -8,8 +8,8 @@
   "unpkg": "dist/supercluster.min.js",
   "scripts": {
     "pretest": "eslint index.js bench.js test/test.js demo/index.js demo/worker.js",
-    "test": "tap --node-arg=-r --node-arg=esm test",
-    "cov": "tap  --node-arg=-r --node-arg=esm test --cov",
+    "test": "tape -r esm test/test.js",
+    "cov": "c8 npm run test",
     "bench": "node --expose-gc -r esm bench.js",
     "build": "mkdirp dist && rollup -c",
     "prepublishOnly": "npm run test && npm run build"
@@ -34,15 +34,16 @@
     "kdbush": "^3.0.0"
   },
   "devDependencies": {
-    "eslint": "^5.12.0",
+    "c8": "^4.1.4",
+    "eslint": "^5.16.0",
     "eslint-config-mourner": "^3.0.0",
-    "esm": "^3.1.0",
+    "esm": "^3.2.22",
     "mkdirp": "^0.5.1",
-    "rollup": "^1.1.0",
+    "rollup": "^1.11.3",
     "rollup-plugin-buble": "^0.19.6",
-    "rollup-plugin-node-resolve": "^4.0.0",
-    "rollup-plugin-terser": "^4.0.2",
-    "tap": "^12.1.1"
+    "rollup-plugin-node-resolve": "^4.2.3",
+    "rollup-plugin-terser": "^4.0.4",
+    "tape": "^4.10.1"
   },
   "eslintConfig": {
     "extends": "mourner",

test/test.js

@@ -1,8 +1,7 @@
 
-import tap from 'tap';
+import {test} from 'tape';
 import Supercluster from '../index.js';
 
-const test = tap.test;
 const places = require('./fixtures/places.json');
 const placesTile = require('./fixtures/places-z0-0-0.json');