fix: Upgrade dependencies, support Rollup 3

Require Node.js 14.18 instead of 8 because of Rollup 3.
Replace ava with tehanu.
Replace eslint with denolint.
Add tests for TypeScript types and CJS output.

BREAKING CHANGE: The minimum version of Node.js is 14.8 now.

Author: prantlf

.denolint.json

@@ -0,0 +1,11 @@
+{
+  "files": {
+    "exclude": [
+      "test/fixtures",
+      "test/snapshots"
+    ]
+  },
+  "rules": {
+    "tags": ["recommended"]
+  }
+}

.eslintignore

@@ -20,11 +20,11 @@ jobs:
       with:
         version: '>=6'
         run_install: |
-          - args: [--frozen-lockfile, --no-verify-store-integrity, --no-optional]
+          - args: [--frozen-lockfile, --no-verify-store-integrity]
     - name: Test
       run: npm test
     - name: Coverage
-      run: pnpx codecov --disable=gcov
+      uses: codecov/codecov-action@v2
     - name: Publish
       uses: cycjimmy/semantic-release-action@v2
       with:

.eslintrc.yml

@@ -1,5 +1,6 @@
 .DS_Store
-.eslintcache
+*.log
+*.map
 coverage
-dist
+/lib/index.cjs
 node_modules

.github/workflows/ci.yml

@@ -8,11 +8,7 @@
       "type": "node",
       "request": "launch",
       "name": "tests",
-      "program": "${workspaceFolder}/node_modules/ava/profile.js",
-      "args": [
-        "${file}",
-        "--serial"
-      ],
+      "program": "${workspaceFolder}/test/index.js",
       "skipFiles": [
         "<node_internals>/**"
       ]

.gitignore

@@ -1,11 +1,11 @@
 {
   "files.exclude": {
     "**/.git": true,
-    "**/.DS_Store": true,
-    "**/dist": true
+    "**/.DS_Store": true
   },
   "search.exclude": {
     "**/node_modules": true,
-    "**/coverage": true
+    "**/coverage": true,
+    "pnpm-lock.yaml": true
   }
 }

.tslintrc.yml

@@ -7,11 +7,11 @@
 
 A [Rollup] plugin which converts `.json` files to ES6 modules. Recognizes standard [JSON], CJSON (JSON with comments) and [JSON5] (further more flexible JSON).
 
-This plugin is based on [`@rollup/plugin-json`]. It supports all original options. It leverages the parser from [`@prantlf/jsonlint`] to provide better error information in case or invalid input and to parse JSON extensions like CJSON and JSON5. If no extension is enabled, the standard `JSON.parse` will be used for the best performance.
+This plugin started as an overwrite of [`@rollup/plugin-json`]. It supports all the original options. It leverages the parser from [`@prantlf/jsonlint`] to provide better error information in case or invalid input and to parse JSON extensions like CJSON and JSON5. If no extension is enabled, the standard `JSON.parse` will be used for the best performance.
 
 ## Requirements
 
-This plugin requires [Node.js] [LTS] (currently 12, at least 8) and Rollup 1.20 or newer.
+This plugin requires [Node.js] [LTS] (currently 18, at least 14.8) and Rollup 1.20 or newer.
 
 ## Installation
 
@@ -60,6 +60,13 @@ A shortcut for setting the three boolean flags below.
 * `cjson` - expects CJSON (sets `ignoreComments` to `true`)
 * `json5` - expects JSON5 (sets `ignoreComments`, `ignoreTrailingCommas` and `allowSingleQuotedStrings` to `true`)
 
+### `ignoreBOM`
+
+Type: `Boolean`<br>
+Default: `false`
+
+If `true`, the leading UTF-8 byte-order mark will be ignored.
+
 ### `ignoreComments`
 
 Type: `Boolean`<br>