#99 Canon EF 135mm f/2L lens name mismatch

[Tomasz Golinski]

Exiv reports: "Canon EF 135mm f/2L" while Lensfun uses: "Canon EF 135mm f/2.0L USM".

Also please add newer Canon M series cameras to mil-canon.xml (M5, M6, M10, M100, M50). They all share crop factor:

<camera>
    <maker>Canon</maker>
    <model>Canon EOS M100</model>
    <model lang="en">EOS M100</model>
    <mount>Canon EF-M</mount>
    <cropfactor>1.613</cropfactor>
</camera>

[junkyardsparkle]

Fixed in github repo; this can be closed.