v3.0.3

• NPM package Yarn workspace support is optional now, see #124
• Upgrade all dependencies (except xml2js, see #125)
• Parse app version from package.json
• Moved templates, packages.xml, package-data-parser.ts and template-processor.ts from @ts-for-gir/lib to @ts-for-gir/generator-typescript
• Cleanup yarn scripts in ./package.json