Support for Ruby 3.3.0

Fix compatibility with Ruby 3.3 (#9)

* allow ruby 3.3

* update branch

* eliminate ruby 2.7 for rails 7.0

v0.4.1 -- Ruby 3.2 support

Merge pull request #8 from payrollhero/ruby3

Ruby 3.2 support

Ruby 3.0 / 3.1 support

Merge pull request #7 from payrollhero/ruby3

ruby 3 support

Fix problem with parser takes strings that looks like a numeric value #6

Merge pull request #6 from payrollhero/fix-string-numeric-compare

Problem is parser takes strings that looks like a numeric value

Cell and Column Validation

Adds cell and column validation.