make rxjs a peer dependency

package.json

@@ -9,15 +9,17 @@
     "release": "yarn build && ./scripts/release.sh"
   },
   "dependencies" :{
-    "rxjs": "5.4.2",
+    "@angular-devkit/schematics": "0.0.16",
     "jasmine-marbles": "0.1.0"
   },
+  "peerDependencies" :{
+    "rxjs": "*"
+  },
   "devDependencies": {
+    "rxjs": "5.4.3",
     "typescript": "2.4.2",
     "@types/node": "8.0.7",
     "@types/jasmine": "2.5.53",
-    "@angular-devkit/schematics": "0.0.16",
-    "@angular/cli": "1.3.0",
     "jest": "20.0.4"
   },
   "author": "Victor Savkin",