Prepare release 0.4.0

[fendor]

Many changes, time for a new release!

Most notable

• Return CompilerOptions in initialization #130 Return CompilerOptions in initialization
• Implement hook into config parser #131 Implement hook into config parser
• Enable GHC 8.8.1 windows ci #128 Enable GHC 8.8.1 windows ci
• Catch permission errors in cradle discovery #127 Catch permission errors in cradle discovery
• Add explicit cradle predicates and multi cradle depend on its cradles #119 Add explicit cradle predicates and multi cradle depend on its cradles
• Fix outdated direct cradle in README #124 Fix outdated direct cradle in README
• Pass filepath to cabal v2-repl when getting flags #123 Pass filepath to cabal v2-repl when getting flags
• CPP for GHC 8.10 compatibility #134 CPP for GHC 8.10 compatibility
• Derive Ord for ComponentOptions #133 Derive Ord for ComponentOptions
• Lower the required version of the GHC dependency #138 Lower the required version of the GHC dependency
• Add tests for implicit cradles #135 Add tests for implicit cradles
• Add Functor instance for Cradle and ActionName #140 Add Functor instance for Cradle and ActionName

Before the release:

• tested with ghcide as per Update to latest hie-bios ghcide#382
• tested with haskell-ide-engine as per Update HIE to use latest hie-bios haskell-ide-engine#1601