[nongnu] elpa-admin 9ab6e7e 217/439: Update packages/yasnippet by subtree-merging from its external upstream

[Philip Kaludercic]

branch: elpa-admin
commit 9ab6e7ea2711383f751fc8778175c9748134deb9
Merge: a30b538 da7456c
Author: João Távora <joaotavora@gmail.com>
Commit: João Távora <joaotavora@gmail.com>

    Update packages/yasnippet by subtree-merging from its external upstream
    
    Again, packages/yasnippet/snippets is left untouched in GNU ELPA. The
    upstream version uses a submodule pointing to a snippets repo which
    lives at https://github.com/AndreaCrotti/yasnippet-snippets.git
    
    Conflicts: packages/yasnippet/snippets