switch to yarn

package.json

@@ -1,14 +1,15 @@
 {
-  "name": "vugg",
-  "version": "1.1.0",
+  "name": "matrix-wug",
+  "version": "2.4.3",
   "description": "Language bot for matrix",
   "main": "index.js",
+  "bin": "build/index.js",
   "scripts": {
     "build": "tsc",
     "start": "node build/index.js"
   },
   "author": "Daniel",
-  "license": "ISC",
+  "license": "AGPL3",
   "dependencies": {
     "matrix-bot-sdk": "^0.3.2",
     "@types/js-yaml": "^3.12.1",

shell.nix

@@ -1,7 +1,7 @@
 with import <nixpkgs> {};
 stdenv.mkDerivation {
   name = "node";
-  buildInputs = [ nodejs-10_x ];
+  buildInputs = [ nodejs-10_x yarn ];
   shellHook = ''
     export PATH="$PWD/node_modules/.bin/:$PATH"
   '';