Add ESLint and Prettier

- Adds in support for ESLint and Prettier

Author: wardellbagby

.eslintrc.js

@@ -0,0 +1,32 @@
+module.exports = {
+  plugins: ["@typescript-eslint", "prettier"],
+  ignorePatterns: ["dist/**/*", "**/node_modules/**"],
+  extends: ["standard-with-typescript", "prettier"],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    tsconfigRootDir: __dirname,
+    project: true,
+  },
+  rules: {
+    "prettier/prettier": "error",
+    "@typescript-eslint/naming-convention": "off",
+    "@typescript-eslint/restrict-template-expressions": "off",
+    "@typescript-eslint/strict-boolean-expressions": "off",
+  },
+  overrides: [
+    {
+      files: "**/*.js",
+      parserOptions: {
+        project: null,
+      },
+    },
+    {
+      files: "**/*.spec.ts",
+      rules: {
+        "@typescript-eslint/no-dynamic-delete": "off",
+        "@typescript-eslint/no-var-requires": "off",
+      },
+    },
+  ],
+  root: true,
+};

README.md

@@ -38,7 +38,22 @@ npm run package
 
 and committing the resulting changes that will be in the `dist/` folder.
 
+### Formatting and linting
+
+This project uses [ESLint](https://eslint.org/) for linting and [Prettier](https://prettier.io/) for source code formatting. You can run the lint checks by running:
+
+```shell
+npm run lint
+```
+
+If you have lint errors that are automatically fixable, you can fix those by running:
+
+```shell
+npm run lint:fix
+```
+
 ## Releasing
+
 Releases are done by creating a new tag and pushing that tag to the repo. A new
 release can be made via the following: