vim: Import v8.1.1343

* 8.1.1343: text properties not adjusted for Visual block mode delete
* 8.1.1342: using freed memory when joining line with text property
* 8.1.1341: text properties are lost when joining lines
* 8.1.1340: attributes from 'cursorline' overwrite textprop
* 8.1.1339: installer needs to product name et al.
* 8.1.1338: hang when concealing the '>' shown for half of wide char
* 8.1.1337: get empty text prop when splitting line just after text prop

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.1.1336](https://github.com/vim/vim/releases/tag/v8.1.1336): some eval functionality is not covered by tests\n* [8.1.1335](https://github.com/vim/vim/releases/tag/v8.1.1335): listener callback is called after inserting text\n* [8.1.1334](https://github.com/vim/vim/releases/tag/v8.1.1334): when buffer is hidden "F" in 'shortmess' is not used
+* [8.1.1343](https://github.com/vim/vim/releases/tag/v8.1.1343): text properties not adjusted for Visual block mode delete\n* [8.1.1342](https://github.com/vim/vim/releases/tag/v8.1.1342): using freed memory when joining line with text property\n* [8.1.1341](https://github.com/vim/vim/releases/tag/v8.1.1341): text properties are lost when joining lines\n* [8.1.1340](https://github.com/vim/vim/releases/tag/v8.1.1340): attributes from 'cursorline' overwrite textprop\n* [8.1.1339](https://github.com/vim/vim/releases/tag/v8.1.1339): installer needs to product name et al.\n* [8.1.1338](https://github.com/vim/vim/releases/tag/v8.1.1338): hang when concealing the '>' shown for half of wide char\n* [8.1.1337](https://github.com/vim/vim/releases/tag/v8.1.1337): get empty text prop when splitting line just after text prop