v0.8.0

6d28748 Release 0.8.0
9c314f7 Require Python 3
ac1ddd3 Merge Pascal comment style with OCaml's
4aa7edf Prefer vim.vars.get() to vim.vars.has_key()
ee45716 Add ftplugin for Java classes
3c8d5e5 Bump version to 0.8.0-pre
6b0ef60 Expand test matrix
62d5c7f 0BSD test case should not depend on current year
1da196c Drop python 3.4 from build matrix
5ce58ff Upgrade Ubuntu runner
80b183d Fix neovim workflow
5cdcbb0 Upgrade actions