chore(deps): update dependency cross-env to v6 (#71)

Author: renovate[bot]

package.json

@@ -23,7 +23,7 @@
     "@storybook/react": "^5.0.11",
     "@types/react": "16.9.12",
     "babel-loader": "^8.0.6",
-    "cross-env": "^5.2.0",
+    "cross-env": "^6.0.0",
     "intersection-observer": "^0.7.0",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",

yarn.lock

@@ -5128,12 +5128,12 @@ create-react-context@^0.3.0:
     gud "^1.0.0"
     warning "^4.0.3"
 
-cross-env@^5.2.0:
-  version "5.2.1"
-  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.2.1.tgz#b2c76c1ca7add66dc874d11798466094f551b34d"
-  integrity sha512-1yHhtcfAd1r4nwQgknowuUNfIT9E8dOMMspC36g45dN+iD1blloi7xp8X/xAIDnjHWyt1uQ8PHk2fkNaym7soQ==
+cross-env@^6.0.0:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-6.0.3.tgz#4256b71e49b3a40637a0ce70768a6ef5c72ae941"
+  integrity sha512-+KqxF6LCvfhWvADcDPqo64yVIB31gv/jQulX2NGzKS/g3GEVz6/pt4wjHFtFWsHMddebWD/sDthJemzM4MaAag==
   dependencies:
-    cross-spawn "^6.0.5"
+    cross-spawn "^7.0.0"
 
 [email protected], cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"