v3.3.0

• Report diagnostics only on certain files with reportFiles option - thanks @freeman!
• Replaced option contextAsConfigBasePath with context option. Strictly speaking a breaking change. However, given the original option was never able to fulfil its intended purpose I've decided to treat this as just a new feature; there seems no possibility that anyone can be using contextAsConfigBasePath - thanks @christiantinauer!
• Added support for the new watch api of TypeScript compiler. nb This feature has been placed behind a new experimentalWatchApi option until it has been thoroughly tested. All being well it is likely to become the default behaviour for ts-loader in future - thanks @sheetalkamat!