Externalize preact-context (#44)

Externalize preact-context

Author: fjorgemota

package.json

@@ -42,7 +42,8 @@
   "homepage": "https://github.com/developit/preact-redux",
   "peerDependencies": {
     "preact": "<10",
-    "redux": ">=2"
+    "redux": ">=2",
+    "preact-context": ">=1.1.0"
   },
   "devDependencies": {
     "@babel/cli": "^7.4.3",