Merge pull request #131 from FlorianRappl/devel

Release 3.0.0

Keep .NET 5 for the Linux build

Removed 5.x

Updated functions

Fixed issue with functions as props

Updated to use is / is not for null comparisons

added metadata

Implemented placeholder parameter #129

Fixed hex num representation #128

Merge pull request #126 from josefblaha/issues/#125-overflow-2

Improved arithmetic overflow detection to fix #125