Merge pull request #474 from open-rpc/fix/eslint

fix: upgrade to eslint

Author: shanejonas

eslint.config.js

@@ -0,0 +1,15 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+  files: ['./src/**/*.ts'],
+};
+

jest.config.js

@@ -4,7 +4,6 @@ module.exports = {
   "resetMocks": true,
   "restoreMocks": true,
   "rootDir": "./src",
-  "testEnvironment": "jsdom",
   "testPathIgnorePatterns": ["./build"],
   "preset": "ts-jest"
-}
+}