Fix false positive for string non-equal comparison

[nunnatsa]

Description

Fix bug where when comparing two strings with non-equal sign (e.g. < or >=), the linter wrongly triggered a warning and suggested to use BeNumerically.

Fixes #82

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• [x] Added test case and related test data
• [x] Update the functional test

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I ran golangci-lint

[github-actions[bot]]

Pull Request Test Coverage Report for Build 4830779610

• 10 of 10 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 84.44%

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Totals
Change from base Build 4786259702:	0.2%
Covered Lines:	814
Relevant Lines:	964

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💛 - Coveralls