feat(rql): add function to get data type of field (#80)

feat: add util function to get type of field

feat(rql): add function to get data type of field (#80)

feat: add util function to get type of field

feat: add more string operators (#78)

feat: add support for string operators

feat: add in and notIn operator for string datatype (#77)

* feat: add in operator for string datatype

* feat: add not in operator for string datatype

refactor: change key name (#75)

fix: update go version

fix(rql): add `lt` operation in string and date type (#74)

fix(rql): add lt operation in string and date type

fix(rql): add `lt` operation in string and date type (#74)

fix(rql): add lt operation in string and date type

feat: add query parser library (#73)

* feat: add query parser library

* feat: return error if invalid type

* refactor: remove main.go

* refactor: lint fix

* refactor: rename to rql

* refactor: make data type key private

* refactor: remove custom util function

* refactor: fix tests

* fix golangci.yml

* refactor: create constants

* refactor: create constants

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Co-authored-by: Punit Kulal <punitkulal1996@gmail.com>

feat: config package revamp (#71)