devel/got: update to 0.127
User-visible changes:
- make 'got merge' accept tags as merge source argument
- do not raise errors when unversioned files are found during got rm -k
- add rm -s ? option for deleting unversioned files from the work tree
- add rm -I option for also deleting ignored unversioned files with rm -s ?
- make 'tog log' reload the work tree's base-commit info during Ctrl-L refresh
- fix failures due to trailing slashes in checkout -p path-prefix argument