I removed unused import from model_filter_compound module.
I refactored the query parser to use ll gramar rather than regex. EQ operator work as expected for now.
I migrated gt and ge operations to ll grammar.
I added support for like operation. Lexer now successfully ignores whitespaces if they are not within a quoted string.
I improved the lexer so that it correctly reads [,] json lists. I migrated in operator to LL grammar.
I migrated unary operator asc to ll grammar.
I migrated unary operator desc to ll grammar.
I migrated compound and operator to LL grammar.
I migrated or operator to LL grammar.
I removed support for multiple sorting criteria.
I updated technical summary and rest standards for ROA
I removed pylint warnings from query parser.