vim: swap to git

Every commit to vim is a separate git tag and release. To avoid
endless, countless updates the package now tracks git.

You will no longer receive notifications for vim updates daily
or semi-daily. Instead, everytime you run 'kiss b vim', the
latest release will be built.

On milestones I may bump the release number (second field in
version) to ensure you receive the major changes (8.3 -> 8.4).

extra/vim/checksums

@@ -1 +1 @@
-3b56603aebc47f06e06a1419b9c5db855f4af5dc71ffa28a00cebcf4b4162aa7  v8.2.0119.tar.gz
+git                                                               vim

extra/vim/sources

@@ -1 +1 @@
-https://github.com/vim/vim/archive/v8.2.0119.tar.gz
+git+https://github.com/vim/vim

extra/vim/version

@@ -1 +1 @@
-8.2.0119 1
+git 1