feat(condition): Add Number Less Than Inspector

[Mallika05]

Description

Adds number_less_than inspector

Motivation and Context

Ref: #183

This is for comparing a number's value, which is currently only possible using the string_match function like this:

sub.cnd.str.match({ object: {source_key: 'FIELD'}, pattern: '^[0-9]{,3}$'}),

This inspector is simpler to understand:

sub.cnd.num.less_than({ object: {source_key: 'FIELD'}, value: 999 }), // < 999

The target value type is float64, but this works just as well with integers.

How Has This Been Tested?

Added unit tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.