chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

yarn.lock

@@ -832,13 +832,12 @@ fetch-ie8@^1.4.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/fetch-ie8/-/fetch-ie8-1.5.0.tgz#f1141c3f96cbc8937aa31b0fbc1a770220fbc15b"
 
-fetch-mock@^5.12.1:
-  version "5.12.1"
-  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-5.12.1.tgz#b1808310f51ab286d1b487a8cb39dfbecb0d097a"
+fetch-mock@^6.0.1:
+  version "6.0.1"
+  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-6.0.1.tgz#c923c9d6b40e1d24261720581cdb899e792c2e4e"
   dependencies:
     glob-to-regexp "^0.3.0"
-    node-fetch "^1.3.3"
-    path-to-regexp "^1.7.0"
+    path-to-regexp "^2.1.0"
 
 fetch-ponyfill@^4.1.0:
   version "4.1.0"
@@ -2112,11 +2111,9 @@ path-parse@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
 
-path-to-regexp@^1.7.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.7.0.tgz#59fde0f435badacba103a84e9d3bc64e96b9937d"
-  dependencies:
-    isarray "0.0.1"
+path-to-regexp@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-2.1.0.tgz#7e30f9f5b134bd6a28ffc2e3ef1e47075ac5259b"
 
 path-type@^1.0.0:
   version "1.1.0"