Add rust-analyzer for neovim

roles/neovim/files/lua/plugins/options/lsp.lua

@@ -104,3 +104,9 @@ lspconfig.jedi_language_server.setup {
   capabilities = capabilities,
   on_attach = attach_fn,
 }
+
+-- Rust
+lspconfig.rust_analyzer.setup{
+  capabilities = capabilities,
+  on_attach = attach_fn,
+}

roles/neovim/tasks/main.yml

@@ -31,6 +31,7 @@
           - jedi-language-server
           - lua-language-server
           - texlab
+          - rust-analyzer
     - name: Install things with npm (Archlinux)
       become: true
       npm:
@@ -79,6 +80,7 @@
           - mypy
           - pylint3
           - shellcheck
+          - rust-analyzer
     - name: Install things with pip (Debian)
       pip:
         name: