build: configure eslint for typescript

Author: oldskytree

.eslintrc.js

@@ -1,4 +1,6 @@
 module.exports = {
-    extends: 'gemini-testing',
+    extends: ['gemini-testing', 'plugin:@typescript-eslint/recommended'],
+    parser: '@typescript-eslint/parser',
+    plugins: ['@typescript-eslint'],
     root: true
 };

lib/types/option.ts

@@ -5,14 +5,16 @@ interface MetaInfo {
     isSetByUser: boolean;
 }
 
-export interface OptionParserConfig<Value, MappedValue, Result> {
+/* eslint-disable @typescript-eslint/no-explicit-any */
+export interface OptionParserConfig<Value, MappedValue, Result = any> {
     defaultValue?: Value | ((config: Result, currNode: any) => Value);
     parseCli?: (input?: string) => Value | undefined;
     parseEnv?: (input?: string) => Value | undefined;
     validate?: (value: unknown, config: Result, currNode: any, meta: MetaInfo) => asserts value is Value;
     map?(value: Value, config: Result, currNode: any, meta: MetaInfo): MappedValue;
     isDeprecated?: boolean;
 }
+/* eslint-enable @typescript-eslint/no-explicit-any */
 
 export interface OptionParser<Value, Result> {
     (locator: Locator<Value>, config: Rooted<Result>): Value;