docs: remove gitsigns from async block (#531)

plenary is no longer used in gitsigns

fix: PlenaryBustedDirectory command (#455)

expand() should only be called for the first argument, not for the
second one.
The second argument is a string representation of a Lua option table
which did work in case of a single entry, where only the braces were
removed.
For multiple entries Lua was not able to parse the expanded version as
option table anymore, though.

fix(luarocks-upload): make sure correct archive is uploaded (#444)

the upload script's `sed` call replaces `'scm'` in the following
section:
```lua
if _MODREV == 'scm' then
   source = {
      url = 'git:https://github.com/nvim-lua/plenary.nvim',
   }
end
```
This PR makes sure it only fixes the declaration at the top of the
file.

fix(luarocks-upload): add LUAROCKS_API_KEY to workflow env (#439)

feat: Add solidity filetypes (#410)