Add eslint configs

.eslintignore

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+.vscode
+node_modules
+out

.eslintrc.js

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+module.exports = {
+    root: true,
+    env: {
+        es6: true,
+        node: true,
+    },
+    parser: '@typescript-eslint/parser',
+    parserOptions: {
+        sourceType: 'module',
+        ecmaVersion: 2018,
+        tsconfigRootDir: __dirname,
+        project: ['./tsconfig.eslint.json']
+    },
+    plugins: [
+        '@typescript-eslint',
+    ],
+    extends: [
+        "plugin:@typescript-eslint/recommended",
+        "prettier/@typescript-eslint",
+        "plugin:prettier/recommended"
+    ],
+    rules: {
+        "prettier/prettier": [
+            "error",
+            {
+                trailingComma: "all",
+                endOfLine: "lf",
+                semi: false,
+                singleQuote: true,
+                printWidth: 80,
+                tabWidth: 2
+            }
+        ]
+    },
+};

tsconfig.eslint.json

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+{
+    "extends": "./tsconfig.json",
+    "include": [
+        "src/**/*.ts",
+        ".eslintrc.js"
+    ],
+    "exclude": [
+        "node_modules",
+        "dist"
+    ]
+}