Contract Linting: add lint:types and use @typescript/eslint-parser

[0xpatrickdev]

Building off of #33, update the eslint configuration to use @typescript/eslint-parser. With this in place, we can use typescript to audit jsdoc typedefs and enable better code navigation (go to definition).

[0xpatrickdev]

See this comments for more details on a suggested eslint configuration: https://github.com/Agoric/dapp-offer-up/pull/26#discussion_r1440876220

Here would be the updated directions from the current answer:

1. Run:

   yarn add -D \
   eslint \
   @agoric/eslint-config@dev \
   @endo/eslint-plugin \
   @jessie.js/eslint-plugin \
   eslint-config-airbnb-base \
   eslint-plugin-jsdoc \
   eslint-config-prettier \
   eslint-plugin-import \
   - eslint-plugin-github 
   + eslint-plugin-github \
   + @typescript-eslint/eslint-plugin
   + @typescript-eslint/parser
   + typescript

2. Add the following to your package.json

   
   "eslintConfig" : {
   +  "env": {
   +    "node": true
   +  },
   +  "parser": "@typescript-eslint/parser",
   "parserOptions": {
   -      "sourceType": "module",
   -      "ecmaVersion": 6
   +    "project": "./tsconfig.json",
   +    "sourceType": "module",
   +    "ecmaVersion": 2020
   },
   "extends": [
   +    "plugin:@typescript-eslint/recommended",
    "@agoric"
   ],
   +  "plugins": [
   +    "@typescript-eslint",
   +    "prettier"
   +  ],
   +  "rules": {
   +    "@typescript-eslint/no-floating-promises": "warn",
   +    "no-void": [
   +      "error",
   +      {
   +        "allowAsStatement": true
   +      }
   +    ],
   +    "prettier/prettier": "warn",
   +    "@typescript-eslint/no-unused-vars": [
   +      "error",
   +      {
   +        "vars": "all",
   +        "args": "all",
   +        "argsIgnorePattern": "^_",
   +        "varsIgnorePattern": "^_"
   +      }
   +    ]
   +  },
   }

3. Add a tsconfig.json file (new)
```diff
+{
+  "compilerOptions": {
+    "noEmit": true,
+    "target": "esnext",
+    "module": "esnext",
+    "moduleResolution": "node",
+    "skipLibCheck": true,
+    "checkJs": false,
+    "allowJs": true,
+    "allowSyntheticDefaultImports": true,
+    "maxNodeModuleJsDepth": 2,
+    "strict": true
+  },
+  "include": ["**/*.js", "**/*.ts"],
+  "exclude": ["bundles"]
+}

4. Run yarn eslint '**/*.{js,ts}' (or specify other files/directory globs). Run yarn tsc to lint types.