chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeperio-bot

yarn.lock

@@ -4753,7 +4753,13 @@ source-list-map@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.0.tgz#aaa47403f7b245a92fbc97ea08f250d6087ed085"
 
-source-map-support@^0.4.0, source-map-support@^0.4.18:
+[email protected]:
+  version "0.5.0"
+  resolved "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.0.tgz#2018a7ad2bdf8faf2691e5fddab26bed5a2bacab"
+  dependencies:
+    source-map "^0.6.0"
+
+source-map-support@^0.4.0:
   version "0.4.18"
   resolved "https://registry.npmjs.org/source-map-support/-/source-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
   dependencies:
@@ -4775,6 +4781,10 @@ source-map@^0.4.4:
   dependencies:
     amdefine ">=0.0.4"
 
+source-map@^0.6.0:
+  version "0.6.1"
+  resolved "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
 source-map@~0.2.0:
   version "0.2.0"
   resolved "https://registry.npmjs.org/source-map/-/source-map-0.2.0.tgz#dab73fbcfc2ba819b4de03bd6f6eaa48164b3f9d"