Merge pull request #1098 from leifg/bugfix-for-if-condition

Make unary operator possible in concatenated logic expressions

Merge pull request #1040 from leifg/fix-parser

Merge pull request #971 from leifg/implement-is-null

feat: implement isnull and nullvalue

Merge pull request #970 from leifg/fix-concatenation-with-null

fix: implement concatenation for string and null value

Merge pull request #939 from leifg/allow-brackets-in-variable-names

Properly type check in multiply/divide/exponentiate

Merge pull request #938 from leifg/allow-brackets-in-variable-names

fix: allow brackets for identifier names

Merge pull request #925 from leifg/reduce-files-for-npm

chore: remove files from npm

Merge pull request #754 from jamesmelville/if-datatypes

Allow appropriate datatypes for IF function

Merge pull request #749 from leifg/dont-expose-decimal-library

dont expose decimal library

Merge pull request #746 from leifg/keep-numbers-in-text

fix: process numbers outside of parser