Update README.md

chore: version

lexer+parser: remove opening and closes quotes from strings

chore: version

fix: maintain non-escaped new lines, returns and tabs in single quoted strings

chore: version

parser: add doc string opener to nodes

chore: fmt

parser: add operator span helper

parser: add left & right methods to assignment operation expression

fix: use self/parent expression types instead of simple identifiers

parser: support trait usage on enums

lexer: make bytestring hashable

lexer: remove length from bytestring

parser: make constant structures iterable