Updated matchms_convert tool

[zargham-ahmad]

This PR includes the following:

• Added boolean input for whether to apply metadata harmonization
• Added boolean input on whether to export peak comments (for msp)
• Added option to support different export styles for msp
• updated test and testdata
• updated galaxy tool and matchms version (hardcoded for matchms_convert for now)

closes #242

[hechth]

@zargham-ahmad when I converted one of the libraries (Exposome pesticides) to NIST, the retention time field key is not written, but the value is -is there no key defined for retention time in matchms for this style or what happened here?

[zargham-ahmad]

@zargham-ahmad when I converted one of the libraries (Exposome pesticides) to NIST, the retention time field key is not written, but the value is -is there no key defined for retention time in matchms for this style or what happened here?

that is because we don't have any entry for retention time for nist but the empty key should not have been written to the file. here is the link to the issue https://github.com/matchms/matchms/issues/422 and the fix for it https://github.com/matchms/matchms/pull/423