infrastructure: update "engines" to node>=10.9

.github/workflows/codestyle.yml

@@ -13,7 +13,7 @@ jobs:
  - name: Use Node.js
  uses: actions/setup-node@v1
  with:
- node-version: 12.x
+ node-version: 14.x
 
  - run: npm ci
  - run: npm run code-style

.github/workflows/downstream.yml

@@ -10,7 +10,7 @@ jobs:
  - name: Use Node.js ${{ matrix.node-version }}
  uses: actions/setup-node@v1
  with:
- node-version: 10.x
+ node-version: 14.x
  - run: npm ci
  - run: npm test
  - run: npm run downstream

.github/workflows/ecma262suite.yml

@@ -10,7 +10,7 @@ jobs:
  - name: Use Node.js ${{ matrix.node-version }}
  uses: actions/setup-node@v1
  with:
- node-version: 10.x
+ node-version: 14.x
  - run: npm ci
  - run: npm test
  - run: npm run test-262

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
  runs-on: ubuntu-latest
  strategy:
  matrix:
- node-version: [8.x, 10.x, 12.x, 14.x]
+ node-version: [10.x, 12.x, 14.x]
 
  steps:
  - uses: actions/checkout@v2
@@ -23,7 +23,7 @@ jobs:
  runs-on: macos-latest
  strategy:
  matrix:
- node-version: [8.x, 10.x, 12.x, 14.x]
+ node-version: [10.x, 12.x, 14.x]
 
  steps:
  - uses: actions/checkout@v2
@@ -39,7 +39,7 @@ jobs:
  runs-on: windows-latest
  strategy:
  matrix:
- node-version: [8.x, 10.x, 12.x, 14.x]
+ node-version: [10.x, 12.x, 14.x]
 
  steps:
  - run: git config --global core.autocrlf false
@@ -56,7 +56,7 @@ jobs:
  runs-on: ubuntu-latest
  strategy:
  matrix:
- node-version: [6.x]
+ node-version: [8.x]
 
  steps:
  - uses: actions/checkout@v2

package.json

@@ -13,7 +13,7 @@
  "dist/esprima.js"
  ],
  "engines": {
- "node": ">=8"
+ "node": ">=10.9"
  },
  "author": {
  "name": "Ariya Hidayat",

src/scanner.ts

@@ -527,7 +527,7 @@ export class Scanner {
 
  // 3 digits are only allowed when string starts
  // with 0, 1, 2, 3
- if ('0123'.indexOf(ch) >= 0 && !this.eof() && Character.isOctalDigit(this.source.charCodeAt(this.index))) {
+ if ('0123'.includes(ch) && !this.eof() && Character.isOctalDigit(this.source.charCodeAt(this.index))) {
  code = code * 8 + octalValue(this.source[this.index++]);
  }
  }
@@ -661,7 +661,7 @@ export class Scanner {
 
  // 1-character punctuators.
  str = this.source[this.index];
- if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
+ if ('<>=!+-*%&|^/'.includes(str)) {
  ++this.index;
  }
  }
@@ -1136,7 +1136,7 @@ export class Scanner {
  const astralSubstitute = '\uFFFF';
  let tmp = pattern;
 
- if (flags.indexOf('u') >= 0) {
+ if (flags.includes('u')) {
  tmp = tmp
  // Replace every Unicode escape sequence with the equivalent
  // BMP character or a constant ASCII code point in the case of

src/tsconfig.json

@@ -1,9 +1,10 @@
 {
  "compilerOptions": {
- "target": "ES5",
+ "target": "ES6",
  "module": "commonjs",
  "noImplicitAny": false,
- "strict": true
+ "strict": true,
+ "lib": ["ES2015"]
  },
  "files": [
  "assert.ts",