Handle create/rename/delete TextDocumentEdits

[Lazzer64]

Not all WorkspaceEdits are text document changes. Add support for create/rename/delete edits.

[mattn]

Thank you. Can you add tests?

[Lazzer64]

Added the following

lsp#utils#workspace_edit
  lsp#utils#text_edit#apply_workspace_edit
    [o] should create a new file if kind is create
    [o] should rename a new file if kind is rename
    [o] should delete the file if kind is delete
integration#go#text_document_edits
  [o] should create a new test file

[mattn]

@Lazzer64 Some tests seems failing with double slash issue. Please take a look.

[Lazzer64]

@mattn fixed up those test cases, but don't have a windows machine to verify there at the moment.

I also bumped gopls to v0.17.0 since it adds the codeaction I wanted to use in the integration test (source.addTest).

[Lazzer64]

Looks like go needed a bump to install the newer gopls, updated that too now.

[mattn]

It seems there are still issues with Windows.

[Lazzer64]

@mattn updated to use lsp#utils#path_to_uri instead of a fixed string.

I also saw that, even before this change, the LspCodeActionSync command is hanging in neovim. For the integration test I swapped to using LspCodeAction and a short sleep instead. I think the LspCodeActionSync issue is deserving of its own issue.

[mattn]

Test seems still not working.

integration#go#text_document_edits

  [x] should create a new test file

      Error occurred line:

       16:         Assert Equals(expand("%:p:t"), "math_test.go")

      The equivalent values were expected, but it was not the case.

      

          expected: 'math_test.go'

               got: 'math.go'