Update dependency fetch-mock to v6.4.3

package.json

@@ -71,7 +71,7 @@
     "angular-mocks": "1.7.0",
     "enzyme": "3.3.0",
     "enzyme-adapter-react-16": "1.1.1",
-    "fetch-mock": "6.4.2",
+    "fetch-mock": "6.4.3",
     "jasmine-core": "3.1.0",
     "jasmine-jquery": "2.1.1",
     "karma-firefox-launcher": "1.1.0",

yarn.lock

@@ -3134,9 +3134,9 @@ fbjs@^0.8.16:
     setimmediate "^1.0.5"
     ua-parser-js "^0.7.9"
 
-fetch-mock@6.4.2:
-  version "6.4.2"
-  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-6.4.2.tgz#cb0ff7dc3baf5d3bc8628f73fca73bf862fbaa43"
+fetch-mock@6.4.3:
+  version "6.4.3"
+  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-6.4.3.tgz#52f8e3fa12f7e2922a7851b8ee5d2bdaaebf4db3"
   dependencies:
     babel-polyfill "^6.26.0"
     glob-to-regexp "^0.4.0"