make typescript a peer dependency

Author: jasondibenedetto

package.json

@@ -37,8 +37,7 @@
   "dependencies": {
     "fs-extra": "^5.0.0",
     "globby": "^7.0.0",
-    "lodash": "^4.17.4",
-    "typescript": "^2.2.2"
+    "lodash": "^4.17.4"
   },
   "jest": {
     "transform": {
@@ -50,5 +49,8 @@
       "tsx",
       "js"
     ]
+  },
+  "peerDependencies": {
+    "typescript": ">= 2.2.2"
   }
 }

yarn.lock

@@ -2828,10 +2828,6 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-typescript@^2.2.2:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.3.0.tgz#2e63e09284392bc8158a2444c33e2093795c0418"
-
 uglify-js@^2.6:
   version "2.8.28"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.28.tgz#e335032df9bb20dcb918f164589d5af47f38834a"