fix(package): update @agm/core to version 1.0.0

Closes #802

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@agm/core": "1.0.0-beta.2",
+    "@agm/core": "1.0.0",
     "@angular/animations": "5.0.1",
     "@angular/cdk": "2.0.0-beta.8",
     "@angular/common": "5.0.1",