added eslint

Author: Code-Hex

.eslintrc.json

@@ -0,0 +1,40 @@
+{
+  "env": {
+    "node": true,
+    "es2021": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest"
+  },
+  "plugins": [
+    "@typescript-eslint"
+  ],
+  "rules": {
+    "@typescript-eslint/no-explicit-any": "off"
+  },
+  "overrides": [
+    {
+      "files": [
+        "*.spec.ts"
+      ],
+      "env": {
+        "jest": true
+      },
+      "rules": {
+        "no-unused-vars": "off",
+        "@typescript-eslint/no-unused-vars": "off",
+        "import/no-extraneous-dependencies": "off"
+      }
+    }
+  ],
+  "ignorePatterns": [
+    "dist",
+    "node_modules",
+    "gen"
+  ]
+}

package.json

@@ -23,6 +23,7 @@
     "build": "run-p build:*",
     "build:main": "tsc -p tsconfig.main.json",
     "build:module": "tsc -p tsconfig.module.json",
+    "lint": "eslint --ext .ts .",
     "generate": "run-p build:* && graphql-codegen",
     "prepublish": "run-p build:*"
   },
@@ -47,6 +48,9 @@
     "@graphql-codegen/typescript": "^2.4.2",
     "@tsconfig/recommended": "^1.0.1",
     "@types/jest": "^27.4.0",
+    "@typescript-eslint/eslint-plugin": "^5.10.0",
+    "@typescript-eslint/parser": "^5.10.0",
+    "eslint": "^8.7.0",
     "jest": "^27.4.7",
     "npm-run-all": "^4.1.5",
     "ts-jest": "^27.1.3",