Update LanguageClient to use internal LS

Author: amiralies

package.json

@@ -14,7 +14,7 @@
     "clean": "rm -rf lib/",
     "build": "webpack",
     "els-build": "cd elixir-ls && mix deps.get && mix elixir_ls.release -o ../els-release",
-    "prepack": "npm run clean && npm run build"
+    "prepack": "npm run clean && npm run build && npm run els-build"
   },
   "repository": "github:amiralies/coc-elixir",
   "engines": {

src/index.js

@@ -1,12 +1,11 @@
 // @flow
 
-import { LanguageClient, workspace, services, ExtensionContext } from 'coc.nvim';
+import { LanguageClient, services, ExtensionContext } from 'coc.nvim';
 
 exports.activate = (context: ExtensionContext) => {
-  const config: Object = workspace.getConfiguration().get('elixir', {});
-
+  const command = context.asAbsolutePath('./els-release/language_server.sh');
   const serverOptions = {
-    command: config.pathToEls,
+    command,
   };
 
   const clientOptions = {