Move to eslint from tslint/prettier - improve typings/linting

Author: dhensby

Diff for: .eslintignore

@@ -0,0 +1 @@
+lib/

Diff for: .eslintrc.json

@@ -0,0 +1,34 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": [
+    "@typescript-eslint"
+  ],
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "env": {
+    "es6": true,
+    "mocha": true,
+    "node": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "comma-dangle": "off",
+    "@typescript-eslint/comma-dangle": ["error", "always-multiline"],
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": ["error"],
+    "no-shadow": "off",
+    "@typescript-eslint/no-shadow": ["error"]
+  },
+  "overrides": [{
+    "files": ["test/**/*"],
+    "rules": {
+      "@typescript-eslint/no-explicit-any": "off"
+    }
+  }]
+}