VIM: Keep selection when using < or > in visual mode

When indenting or unindenting a code block, I normally visually select
it and use < or >. However, both of these unselect the selection.

The mappings make vim also do gv after such an action which re-selects
the previous selection.

.gitmodules

@@ -67,3 +67,9 @@
 [submodule "nvim/.config/nvim/pack/bundle/opt/firenvim"]
 	path = nvim/.config/nvim/pack/bundle/opt/firenvim
 	url = https://github.com/glacambre/firenvim
+[submodule "nvim/.config/nvim/pack/bundle/opt/ultisnips"]
+	path = nvim/.config/nvim/pack/bundle/opt/ultisnips
+	url = https://github.com/SirVer/ultisnips
+[submodule "nvim/.config/nvim/pack/bundle/opt/vim-snippets"]
+	path = nvim/.config/nvim/pack/bundle/opt/vim-snippets
+	url = https://github.com/honza/vim-snippets

nvim/.config/nvim/pack/bundle/opt/ultisnips

@@ -0,0 +1 @@
+Subproject commit c270950492d71bac0317d47d42cd0884eefe6490

nvim/.config/nvim/pack/bundle/opt/vim-snippets

@@ -0,0 +1 @@
+Subproject commit 0c5114e90837eac9af2150406f7821041e7e720b

nvim/.config/nvim/plugin/mappings.vim

@@ -71,3 +71,7 @@ nnoremap <leader>co :!opout <c-r>%<CR><CR>
 " Makes vim default to "very magic" searching
 nnoremap / /\v
 vnoremap / /\v
+
+" Makes vim re-select visual selection when using < or >
+vnoremap < <gv
+vnoremap > >gv