Problem:  wast filetype should be replaced by wat filetype
Solution: start using the official wat filetype name

runtime: rename `wast` filetype to `wat` (Wasm text format)

The problem is the name of the current filetype wast. When the plugin
was initially created, the file extension for Wasm text format was not
fixed and .wast was more popular.

However, recently .wat became the official file extension for
WebAssembly text (WAT) format and .wast is now a file extension for the
unofficial WAST format, which is a superset of .wat for the convenience
to describe the Wasm specification conformance tests.

https://webassembly.js.org/docs/contrib-wat-vs-wast.html

However for now, let's keep using the `wat` filetype even for the .wast
extension, so that we at least do not lose the filetype settings and
syntax highlighting. This can be adjusted later, if it turns out to have
a separate need for.

closes: vim/vim#13533

https://github.com/vim/vim/commit/bc8f79d36a456054ed29f46585830af6d71f57c8

Co-authored-by: rhysd <lin90162@yahoo.co.jp>

runtime: Fix more typos (vim/vim#13354)

* Fix more typos

* Fix typos in ignored runtime/ directory

https://github.com/vim/vim/commit/dbf749bd5aaef6ea2d28bce081349785d174d96a

Co-authored-by: Viktor Szépe <viktor@szepe.net>

runtime(zserio): add zserio syntax (vim/vim#13005)

https://github.com/vim/vim/commit/acb91d3905cfef5eff8edfb76e62a6b6bab1e91e

Co-authored-by: Dominique Pellé <dominique.pelle@gmail.com>

Farewell to Bram and dedicate upcoming Vim 9.1 to him (vim/vim#12749)

https://github.com/vim/vim/commit/e978b4534a5e10471108259118c0ef791106fd92

Also update the header for the following files that were converted to Vim9
script upstream:

- autoload/ccomplete.lua (vim9jitted)
- ftplugin.vim
- ftplugof.vim
- indent.vim
- indent/vim.vim
- makemenu.vim

This also updates the "Last Change" dates, even if some changes (due to rewrites
to Vim9 script) were not ported.

There's still a few other places where Bram is still mentioned as a maintainer
in the files we and Vim have:

- ftplugin/bash.vim
- indent/bash.vim
- indent/html.vim
- indent/mail.vim
- macros/accents.vim
- macros/editexisting.vim
- syntax/bash.vim
- syntax/shared/typescriptcommon.vim
- syntax/tar.vim
- syntax/typescript.vim
- syntax/typescriptreact.vim
- syntax/zimbu.vim

Maybe future patches will address that.

Also exclude changes to .po files that didn't apply automatically (the
`:messages` maintainer string isn't used in Nvim anyway).

Co-authored-by: Christian Brabandt <cb@256bit.org>

Update runtime files.
https://github.com/vim/vim/commit/95a9dd1efc5ae3221865f4970053a5708557e682

Problem:    Syntax menu and build instructions outdated.
Solution:   Update build instructions and syntax menu.
https://github.com/vim/vim/commit/bfd34333302c0b0115ab2a9c995b5adbdb8f4ef8

Update runtime files.
https://github.com/vim/vim/commit/56c860c315c517d304320e12bf7b5c1479546dae

Update runtime files
https://github.com/vim/vim/commit/396e829fa355ebc92a618ef18266a3fed71b7042

Vim 8.1 release

Update version number and information.  Fix a couple of tests.
https://github.com/vim/vim/commit/b1c9198afb7ff902588b45fbe44f0760a9f48375

Update runtime files.

https://github.com/vim/vim/commit/fc39ecf8ded5466d7e9cbde8db75517718b023d8