fix(job): escape cwd path (#479)

Author: jamestrew

lua/plenary/job.lua

@@ -65,7 +65,7 @@ local function expand(path)
     return assert(uv.fs_realpath(path), string.format("Path must be valid: %s", path))
   else
     -- TODO: Probably want to check that this is valid here... otherwise that's weird.
-    return vim.fn.expand(path, true)
+    return vim.fn.expand(vim.fn.escape(path, "$"), true)
   end
 end