vaibhav munjal

fix: In Parsing expandVariables return unchanged value if not exists in envMap or os-environ

1

- [x] BUG: Variable not correct (https://github.com/joho/godotenv/issues/127) With regex expression `(\\)?(\$)(\()?\{?([A-Z0-9_]+)?\}?` https://regex101.com/r/IM10C6/1 any value after $ is treating as variable, Variable is checked in envMap and return empty string if...