Fixes Proptypes error

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "silverstripe/tagfield",
+    "name": "pixelfusion/silverstripe-tagfield",
     "description": "Tag field for SilverStripe",
     "license": "BSD-3-Clause",
     "type": "silverstripe-vendormodule",

package.json

@@ -73,6 +73,7 @@
     "debounce-promise": "^3.1.0",
     "isomorphic-fetch": "https://registry.npmjs.org/isomorphic-fetch/-/isomorphic-fetch-2.2.1.tgz",
     "jquery": "^3.1.1",
+    "prop-types": "^15.7.2",
     "react": "15.3.1",
     "react-dom": "15.3.1",
     "react-select": "^1.0.0-rc.5",

yarn.lock

@@ -2095,7 +2095,6 @@ date-now@^0.1.4:
 debounce-promise@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debounce-promise/-/debounce-promise-3.1.0.tgz#25035f4b45017bd51a7bef8b3bd9f6401dc47423"
-  integrity sha1-JQNfS0UBe9Uae++LO9n2QB3EdCM=
 
 debug@3.1.0, debug@^3.1.0:
   version "3.1.0"
@@ -4865,7 +4864,7 @@ longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
 
-loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1:
+loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1, loose-envify@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
   dependencies:
@@ -6481,6 +6480,14 @@ prop-types@^15.5.8, prop-types@^15.6.0, prop-types@^15.6.2:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+prop-types@^15.7.2:
+  version "15.7.2"
+  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.2.tgz#52c41e75b8c87e72b9d9360e0206b99dcbffa6c5"
+  dependencies:
+    loose-envify "^1.4.0"
+    object-assign "^4.1.1"
+    react-is "^16.8.1"
+
 proto-list@~1.2.1:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/proto-list/-/proto-list-1.2.4.tgz#212d5bfe1318306a420f6402b8e26ff39647a849"
@@ -6658,6 +6665,10 @@ react-is@^16.4.1:
   version "16.4.1"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.4.1.tgz#d624c4650d2c65dbd52c72622bbf389435d9776e"
 
+react-is@^16.8.1:
+  version "16.8.2"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.8.2.tgz#09891d324cad1cb0c1f2d91f70a71a4bee34df0f"
+
 react-select@^1.0.0-rc.5:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/react-select/-/react-select-1.2.1.tgz#a2fe58a569eb14dcaa6543816260b97e538120d1"