fix: accept rollup 1 as peerDep (#2)

Author: bennypowers

package.json

@@ -60,7 +60,7 @@
     "rollup-pluginutils": "^2.3.0"
   },
   "peerDependencies": {
-    "rollup": "^0.65.2"
+    "rollup": "^0.65.2||^1"
   },
   "devDependencies": {
     "@types/chai": "^4.1.4",