fix(test): typing

runtime/doc/lsp.txt

runtime/lua/vim/lsp/client.lua

test/functional/helpers.lua

test/functional/lua/fs_spec.lua

test/functional/lua/loader_spec.lua

test/functional/lua/overrides_spec.lua

test/functional/lua/secure_spec.lua

test/functional/plugin/editorconfig_spec.lua

test/functional/plugin/lsp/helpers.lua

test/functional/plugin/lsp_spec.lua

test/functional/plugin/man_spec.lua

test/functional/plugin/matchparen_spec.lua

test/functional/plugin/tutor_spec.lua

test/functional/plugin/vim_syntax_spec.lua

test/functional/ui/screen.lua