diff --git a/package-lock.json b/package-lock.json
index 425e431d..e2d56f3b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1091,17 +1091,6 @@
         "@types/babel__traverse": "^7.0.6"
       }
     },
-    "babel-polyfill": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.26.0.tgz",
-      "integrity": "sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=",
-      "dev": true,
-      "requires": {
-        "babel-runtime": "^6.26.0",
-        "core-js": "^2.5.0",
-        "regenerator-runtime": "^0.10.5"
-      }
-    },
     "babel-preset-jest": {
       "version": "24.6.0",
       "resolved": "https://registry.npmjs.org/babel-preset-jest/-/babel-preset-jest-24.6.0.tgz",
@@ -1122,10 +1111,10 @@
         "regenerator-runtime": "^0.11.0"
       },
       "dependencies": {
-        "regenerator-runtime": {
-          "version": "0.11.1",
-          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
-          "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
+        "core-js": {
+          "version": "2.6.11",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+          "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==",
           "dev": true
         }
       }
@@ -1662,9 +1651,9 @@
       "dev": true
     },
     "core-js": {
-      "version": "2.6.5",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.5.tgz",
-      "integrity": "sha512-klh/kDpwX8hryYL14M9w/xei6vrv6sE8gTHDG7/T/+SEovB/G4ejwcfE/CBzO6Edsu+OETZMZ3wcX/EjUkrl5A==",
+      "version": "3.6.4",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.4.tgz",
+      "integrity": "sha512-4paDGScNgZP2IXXilaffL9X7968RuvwlkK3xWtZRVqgd8SYNiVKRJvkFd1aqqEuPfN7E68ZHEp9hDj6lHj4Hyw==",
       "dev": true
     },
     "core-util-is": {
@@ -2322,15 +2311,37 @@
       }
     },
     "fetch-mock": {
-      "version": "7.3.3",
-      "resolved": "https://registry.npmjs.org/fetch-mock/-/fetch-mock-7.3.3.tgz",
-      "integrity": "sha512-MHKcwZ4n9TmnfnVfelUBrrfxtC9tztafIR+F8l/Yu9N+y48fU1BAwj3iSxhYFYELVw73rCZh2DPWtWCekY/t+w==",
+      "version": "9.2.2",
+      "resolved": "https://registry.npmjs.org/fetch-mock/-/fetch-mock-9.2.2.tgz",
+      "integrity": "sha512-hithM+SJMOAufRRaBrEQOawBv4rGsQJcu3fCNJvljFzdeGwmc+gDULdbJR11J4YN37UIVXRTtwP5QWMzDEKRgQ==",
       "dev": true,
       "requires": {
-        "babel-polyfill": "^6.26.0",
+        "babel-runtime": "^6.26.0",
+        "core-js": "^3.0.0",
+        "debug": "^4.1.1",
         "glob-to-regexp": "^0.4.0",
+        "is-subset": "^0.1.1",
+        "lodash.isequal": "^4.5.0",
         "path-to-regexp": "^2.2.1",
+        "querystring": "^0.2.0",
         "whatwg-url": "^6.5.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        }
       }
     },
     "figures": {
@@ -4491,6 +4502,12 @@
       "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=",
       "dev": true
     },
+    "lodash.isequal": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
+      "integrity": "sha1-QVxEePK8wwEgwizhDtMib30+GOA=",
+      "dev": true
+    },
     "lodash.isplainobject": {
       "version": "4.0.6",
       "resolved": "https://registry.npmjs.org/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz",
@@ -9074,6 +9091,12 @@
       "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
       "dev": true
     },
+    "querystring": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/querystring/-/querystring-0.2.0.tgz",
+      "integrity": "sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=",
+      "dev": true
+    },
     "quick-lru": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-1.1.0.tgz",
@@ -9163,9 +9186,9 @@
       }
     },
     "regenerator-runtime": {
-      "version": "0.10.5",
-      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz",
-      "integrity": "sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=",
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+      "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
       "dev": true
     },
     "regex-not": {
diff --git a/package.json b/package.json
index 18e71f22..d50900e8 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "@types/jest": "24.0.15",
     "chai": "4.2.0",
     "fetch-everywhere": "1.0.5",
-    "fetch-mock": "7.3.3",
+    "fetch-mock": "9.2.2",
     "husky": "2.4.1",
     "jest": "24.8.0",
     "prettier": "1.18.2",
diff --git a/yarn.lock b/yarn.lock
index fe44dfbb..1ad93cab 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -845,15 +845,6 @@ babel-plugin-jest-hoist@^24.6.0:
   dependencies:
     "@types/babel__traverse" "^7.0.6"
 
-babel-polyfill@^6.26.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-6.26.0.tgz#379937abc67d7895970adc621f284cd966cf2153"
-  integrity sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=
-  dependencies:
-    babel-runtime "^6.26.0"
-    core-js "^2.5.0"
-    regenerator-runtime "^0.10.5"
-
 babel-preset-jest@^24.6.0:
   version "24.6.0"
   resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-24.6.0.tgz#66f06136eefce87797539c0d63f1769cc3915984"
@@ -1455,11 +1446,16 @@ copy-descriptor@^0.1.0:
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
-core-js@^2.4.0, core-js@^2.5.0:
+core-js@^2.4.0:
   version "2.6.5"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.5.tgz#44bc8d249e7fb2ff5d00e0341a7ffb94fbf67895"
   integrity sha512-klh/kDpwX8hryYL14M9w/xei6vrv6sE8gTHDG7/T/+SEovB/G4ejwcfE/CBzO6Edsu+OETZMZ3wcX/EjUkrl5A==
 
+core-js@^3.0.0:
+  version "3.6.4"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.6.4.tgz#440a83536b458114b9cb2ac1580ba377dc470647"
+  integrity sha512-4paDGScNgZP2IXXilaffL9X7968RuvwlkK3xWtZRVqgd8SYNiVKRJvkFd1aqqEuPfN7E68ZHEp9hDj6lHj4Hyw==
+
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -2056,14 +2052,19 @@ fetch-everywhere@1.0.5:
     node-fetch "^1.0.1"
     whatwg-fetch ">=0.10.0"
 
-fetch-mock@7.3.3:
-  version "7.3.3"
-  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-7.3.3.tgz#d1abdf309cdef8adb4b0fc0596d3f97fcfbd4528"
-  integrity sha512-MHKcwZ4n9TmnfnVfelUBrrfxtC9tztafIR+F8l/Yu9N+y48fU1BAwj3iSxhYFYELVw73rCZh2DPWtWCekY/t+w==
+fetch-mock@9.2.2:
+  version "9.2.2"
+  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-9.2.2.tgz#a653b65d0d66a79c1ccfb26d0d4d9b31fdee1aee"
+  integrity sha512-hithM+SJMOAufRRaBrEQOawBv4rGsQJcu3fCNJvljFzdeGwmc+gDULdbJR11J4YN37UIVXRTtwP5QWMzDEKRgQ==
   dependencies:
-    babel-polyfill "^6.26.0"
+    babel-runtime "^6.26.0"
+    core-js "^3.0.0"
+    debug "^4.1.1"
     glob-to-regexp "^0.4.0"
+    is-subset "^0.1.1"
+    lodash.isequal "^4.5.0"
     path-to-regexp "^2.2.1"
+    querystring "^0.2.0"
     whatwg-url "^6.5.0"
 
 figgy-pudding@^3.0.0, figgy-pudding@^3.1.0, figgy-pudding@^3.4.1, figgy-pudding@^3.5.1:
@@ -3726,6 +3727,11 @@ lodash.get@^4.4.2:
   resolved "https://registry.yarnpkg.com/lodash.get/-/lodash.get-4.4.2.tgz#2d177f652fa31e939b4438d5341499dfa3825e99"
   integrity sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=
 
+lodash.isequal@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
+  integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
+
 lodash.isplainobject@^4.0.6:
   version "4.0.6"
   resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
@@ -5172,6 +5178,11 @@ query-string@^6.1.0:
     split-on-first "^1.0.0"
     strict-uri-encode "^2.0.0"
 
+querystring@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
+  integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
+
 quick-lru@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-1.1.0.tgz#4360b17c61136ad38078397ff11416e186dcfbb8"
@@ -5356,11 +5367,6 @@ redeyed@~2.1.0:
   dependencies:
     esprima "~4.0.0"
 
-regenerator-runtime@^0.10.5:
-  version "0.10.5"
-  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz#336c3efc1220adcedda2c9fab67b5a7955a33658"
-  integrity sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=
-
 regenerator-runtime@^0.11.0:
   version "0.11.1"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"