Added support for 'package.json.ts' and 'package.json.js' and migration to ESM syntax

• General maintenance 00f85e0
• Added .npmrc with 'min-release-age=3' 59b1a1b
• Updated/refactored some of the tests 447b395
• Added support for 'package.json.js' d8fe94d
• Added support for 'package.json.ts' 2e0bc83
• Added some tests 988f529
• Updated various npm packages 7c67f7f
• Updated ESLint 47337d3
• Migrated from 'mocha' to 'vitest' becb4a8
• Migrated from CommonJS to ESM syntax d540139
• Updated package-lock.json 158ebb0

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v1.6.0...v2.0.0