Tools: py3 compatible version checks

[theotherjimmy]

Description

I added version checks without checking their python 3 compatibility.
This PR changes the regular expressions to operate on bytes-like objects
and decodes the version before passing it to loose version.

Pull request type

[x] Fix
[ ] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

[cmonr]

Looks like it should work. Going to test locally tomorrow morning since CI doesn't test Py3 yet.

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2566
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7466/

Triggering tests

/morph test
/morph uvisor-test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2210
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7466/

[mbed-ci]

Test : SUCCESS

Build number : 2320
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7466/2320

[cmonr]

👍