chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

yarn.lock

@@ -3724,25 +3724,29 @@ header-case@^1.0.0:
  no-case "^2.2.0"
  upper-case "^1.1.3"
 
-[email protected]:
- version "2.7.0"
- resolved "https://registry.yarnpkg.com/helmet-csp/-/helmet-csp-2.7.0.tgz#7934094617d1feb7bb2dc43bb7d9e8830f774716"
+[email protected]:
+ version "0.3.0"
+ resolved "https://registry.yarnpkg.com/helmet-crossdomain/-/helmet-crossdomain-0.3.0.tgz#707e2df930f13ad61f76ed08e1bb51ab2b2e85fa"
+
+[email protected]:
+ version "2.7.1"
+ resolved "https://registry.yarnpkg.com/helmet-csp/-/helmet-csp-2.7.1.tgz#e8e0b5186ffd4db625cfcce523758adbfadb9dca"
  dependencies:
  camelize "1.0.0"
  content-security-policy-builder "2.0.0"
  dasherize "2.0.0"
- lodash.reduce "4.6.0"
  platform "1.3.5"
 
-helmet@3.12.1:
- version "3.12.1"
- resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.12.1.tgz#8b05bbd60f3966d70f13dad0de2c1d6c1a8303f1"
+helmet@3.13.0:
+ version "3.13.0"
+ resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.13.0.tgz#d6d46763538f77b437be77f06d0af42078b2c656"
  dependencies:
  dns-prefetch-control "0.1.0"
  dont-sniff-mimetype "1.0.0"
  expect-ct "0.1.1"
  frameguard "3.0.0"
- helmet-csp "2.7.0"
+ helmet-crossdomain "0.3.0"
+ helmet-csp "2.7.1"
  hide-powered-by "1.0.0"
  hpkp "2.0.0"
  hsts "2.1.0"
@@ -4713,10 +4717,6 @@ lodash.pick@^4.4.0:
  version "4.4.0"
  resolved "https://registry.yarnpkg.com/lodash.pick/-/lodash.pick-4.4.0.tgz#52f05610fff9ded422611441ed1fc123a03001b3"
 
-[email protected]:
- version "4.6.0"
- resolved "https://registry.yarnpkg.com/lodash.reduce/-/lodash.reduce-4.6.0.tgz#f1ab6b839299ad48f784abbf476596f03b914d3b"
-
 [email protected]:
  version "4.17.5"
  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"