vim: Import v8.1.0186

* 8.1.0186: test for getwininfo() fails in GUI
* 8.1.0185: running tests writes lua.vim even though it is not used
* 8.1.0184: not easy to figure out the window layout
* 8.1.0183: Lua API changed, breaking the build
* 8.1.0182: Unicode standard was updated
* 8.1.0181: memory leak with trailing characters in skip expression

gitlog.txt

@@ -1 +1 @@
-* [8.1.0180](https://github.com/vim/vim/releases/tag/v8.1.0180): static analysis errors in Lua interface\n* [8.1.0179](https://github.com/vim/vim/releases/tag/v8.1.0179): redundant condition for boundary check
+* [8.1.0186](https://github.com/vim/vim/releases/tag/v8.1.0186): test for getwininfo() fails in GUI\n* [8.1.0185](https://github.com/vim/vim/releases/tag/v8.1.0185): running tests writes lua.vim even though it is not used\n* [8.1.0184](https://github.com/vim/vim/releases/tag/v8.1.0184): not easy to figure out the window layout\n* [8.1.0183](https://github.com/vim/vim/releases/tag/v8.1.0183): Lua API changed, breaking the build\n* [8.1.0182](https://github.com/vim/vim/releases/tag/v8.1.0182): Unicode standard was updated\n* [8.1.0181](https://github.com/vim/vim/releases/tag/v8.1.0181): memory leak with trailing characters in skip expression