versionLT() function changed to fix the issue while comparing two versions

[dipjul]

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Github issue: 1456
Changes:

• Change the versionLT() function to compare 2 different plugin versions

[timja]

Can you add tests please and make sure it works on linux and windows,

see:
https://github.com/jenkinsci/docker/blob/master/tests/functions.Tests.ps1
https://github.com/jenkinsci/docker/blob/master/tests/functions.bats

[whoami-anoint]

There are no checks for invalid or malformed version strings, which could lead to unexpected behavior if the input is not as expected.

Consider adding input validation to handle different input scenarios gracefully.