Ignore error of prop_add/prop_remove (#721)
Ignore error of prop_add/prop_remove (#721)

Some language server send diagnostics which send wrong locations.

Co-authored-by: hrsh7th <d49d5f46ef20c9734fdc4a608c17a9633d826887@gmail.com>

prabirshrestha/vim-lsp,prabirshrestha/vim-lsp