Update git submodules
* Update designate from branch 'master'
- Merge "Remove Babel from lower-constraints"
- Remove Babel from lower-constraints
See Id54c22f820b1aa6315d721e354ce150c657bd4fd
Change-Id: I37eed6862a39c5821ac9d89b867822a110426056
Signed-off-by: Nicolas Bock <nicolas.bock@canonical.com>
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