Default navigation for commands that jump to new locations has been
implemented with the `ale_default_navigation` variable, and all commands
that jump to locations now support `-tab`, `-split`, or `-vsplit`
arguments for overriding the default navigation behavior.
The `settagstack` and `gettagstack` functions don't exist prior to Vim
8.1.0519. And the function definition was unclear whether it intended
to grab the *old* or the *new* file/line/col.
* Add textDocument/typeDefinition for LSP
Doc to spec https://microsoft.github.io/language-server-protocol/specification#textDocument_typeDefinition
This works like textDocument/definition but resolves a location of a
type of an expression under the cursor.
I'm not sure what to do with tsserver though.
* Fix passing column to LSP
* test_go_to_definition: wording
* Add tests for textDocument/typeDefinition
* Add docs for textDocument/typeDefinition
