chore(contract-client): appease eslint

This includes some fixes and updates to eslint configuration to make it
work as expected

- Extended `airbnb-typescript/base` to get it to stop yelling at me
  about importing files without file extension. Saw this recommended as
  the fix on StackOverflow [[1]]. And it makes sense to me that if we are
  extending Airbnb's lint rules and using TypeScript, we probably want
  their TypeScript-specific lint rules, too.
- Added the `eslint-plugin-jsdoc` plugin because the old `valid-jsdoc`
  rule we were using has been deprecated [[2]], and this plugin is the new
  way. Previously we had `valid-jsdoc: 1` (with some extra customization),
  and my guess is that extending `plugin:jsdoc/recommended` (plus some
  customization) is roughly equivalent.
- Researched [[3]] whether JSDoc `@param`-style docs or TSDoc-style
  `/** inline param docs */` work better. TSDoc work better. So disabled
  `jsdoc/require-param`.

  [1]: https://stackoverflow.com/a/67610259/249801
  [2]: https://eslint.org/docs/latest/rules/valid-jsdoc
  [3]: #962 (comment)

.eslintrc.js

@@ -2,9 +2,17 @@ module.exports = {
   env: {
     es6: true,
   },
-  extends: ["airbnb-base", "prettier"],
+  extends: [
+    "airbnb-base",
+    "airbnb-typescript/base",
+    "prettier",
+    "plugin:jsdoc/recommended",
+  ],
   plugins: ["@babel", "prettier", "prefer-import"],
-  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    parser: "@typescript-eslint/parser",
+    project: "./config/tsconfig.json",
+  },
   rules: {
     "node/no-unpublished-require": 0,
   },

package.json

@@ -109,8 +109,10 @@
     "dotenv": "^16.4.5",
     "eslint": "^8.57.0",
     "eslint-config-airbnb-base": "^15.0.0",
+    "eslint-config-airbnb-typescript": "^18.0.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-import": "^2.29.1",
+    "eslint-plugin-jsdoc": "^48.2.4",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prefer-import": "^0.0.1",
     "eslint-plugin-prettier": "^5.1.2",

src/.eslintrc.js

@@ -10,9 +10,12 @@ module.exports = {
     camelcase: 0,
     "class-methods-use-this": 0,
     "linebreak-style": 0,
+    "jsdoc/require-returns": 0,
+    "jsdoc/require-param": 0,
     "new-cap": 0,
     "no-param-reassign": 0,
     "no-underscore-dangle": 0,
+    "no-unused-vars": 0,
     "no-use-before-define": 0,
     "prefer-destructuring": 0,
     "lines-between-class-members": 0,
@@ -21,14 +24,7 @@ module.exports = {
     "prefer-import/prefer-import-over-require": [1],
     "no-console": ["warn", { allow: ["assert"] }],
     "no-debugger": 1,
-    "no-unused-vars": 1,
     "arrow-body-style": 1,
-    "valid-jsdoc": [
-      1,
-      {
-        requireReturnDescription: false,
-      },
-    ],
     "prefer-const": 1,
     "object-shorthand": 1,
     "require-await": 1,