Add tools to manage project (#5)

* add script entries for lint, building and test
* add extra devDependencies
* configure eslint
* add empty `index.test.js`. `test` target currently deactivated

Author: cmeissner

.codacy.yml

@@ -7,3 +7,4 @@ exclude_paths:
   - 'CONTRIBUTING.md'
   - 'docs/**'
   - 'README.md'
+  - 'dist/**'

.eslintignore

@@ -0,0 +1 @@
+dist/

.eslintrc.json

@@ -0,0 +1,18 @@
+{
+    "env": {
+        "commonjs": true,
+        "es6": true,
+        "jest": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+    }
+}

.github/workflows/main.yml

@@ -1,5 +1,7 @@
 name: CI
-on: [push]
+on:
+  - push
+  - pull_request
 
 jobs:
   check: