fix(lsp) Update pylsp to 1.12.0

I chiefly took this update to get
python-lsp/python-lsp-server#371.

This fixes an issues where diagnostics wouldn't show up when running
in single file mode (outside of a git repository).

Author: hfrentzel

languages/python/spec.json

@@ -21,7 +21,7 @@
     "python-lsp-server": {
         "type": "exe",
         "command_name": "pylsp",
-        "version": "1.7.1",
+        "version": "1.12.0",
         "installers": ["Pip"],
         "source_repo": "https://github.com/python-lsp/python-lsp-server"
     },

vim/nvim/lua/dot_helpers.lua

@@ -12,7 +12,7 @@ end
 
 functions.get_git_root = function()
     local git_prefix = 'git -C ' .. vim.fn.expand('%:p:h')
-    if vim.fn.system(git_prefix .. ' rev-parse  --is-inside-work-tree') then
+    if vim.fn.system(git_prefix .. ' rev-parse  --is-inside-work-tree') == 'true' then
         return vim.fn.substitute(
             vim.fn.system(git_prefix .. ' rev-parse --show-toplevel'),
             '\n',