fix: allow angular 5 peer dependency

Author: Matt Lewis

package-lock.json

@@ -154,19 +154,19 @@
     "zone.js": "^0.8.18"
   },
   "peerDependencies": {
-    "@angular/animations": "^4.0.0",
-    "@angular/common": "^4.0.0",
-    "@angular/core": "^4.0.0",
-    "@angular/platform-browser": "^4.0.0",
+    "@angular/animations": ">=4.0.0 <6.0.0",
+    "@angular/common": ">=4.0.0 <6.0.0",
+    "@angular/core": ">=4.0.0 <6.0.0",
+    "@angular/platform-browser": ">=4.0.0 <6.0.0",
     "typescript": "^2.3.0"
   },
   "files": [
     "dist",
     "scss"
   ],
   "dependencies": {
-    "angular-draggable-droppable": "^1.1.0",
-    "angular-resizable-element": "^1.2.3",
+    "angular-draggable-droppable": "^1.1.1",
+    "angular-resizable-element": "^1.2.4",
     "calendar-utils": "0.0.57",
     "date-fns": "^1.28.5",
     "positioning": "^1.3.1"