chore: add lint

Author: cjquines

.eslintignore

@@ -0,0 +1 @@
+dist

.eslintrc.js

@@ -0,0 +1,30 @@
+module.exports = {
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:prettier/recommended",
+  ],
+  parserOptions: {
+    tsconfigRootDir: __dirname,
+    project: ["./tsconfig.json"],
+  },
+  ignorePatterns: [
+    ".eslintrc.js", // https://stackoverflow.com/q/63118405
+    "jest.config.js",
+    "dist/**",
+  ],
+
+  rules: {
+    curly: ["error", "multi-line"],
+    "@typescript-eslint/no-non-null-assertion": 0,
+    "@typescript-eslint/no-empty-interface": 0,
+    "@typescript-eslint/ban-types": 1,
+    "@typescript-eslint/no-unused-vars": [
+      "error",
+      {
+        argsIgnorePattern: "^_",
+        varsIgnorePattern: "^_",
+      },
+    ],
+  },
+};