Add cross-env

package.json

@@ -67,6 +67,7 @@
   "devDependencies": {
     "@strv/eslint-config-react": "^1.0.1",
     "@strv/stylelint-config-styled-components": "^1.0.0",
+    "cross-env": "^5.2.0",
     "cypress": "^3.2.0",
     "eslint-config-prettier": "^4.1.0",
     "eslint-plugin-cypress": "^2.2.1",

yarn.lock

@@ -2612,6 +2612,14 @@ create-react-context@^0.2.2:
     fbjs "^0.8.0"
     gud "^1.0.0"
 
+cross-env@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.2.0.tgz#6ecd4c015d5773e614039ee529076669b9d126f2"
+  integrity sha512-jtdNFfFW1hB7sMhr/H6rW1Z45LFqyI431m3qU6bFXcQ3Eh7LtBuG3h74o7ohHZ3crrRkkqHlo4jYHFPcjroANg==
+  dependencies:
+    cross-spawn "^6.0.5"
+    is-windows "^1.0.0"
+
 cross-spawn@6.0.5, cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -5229,7 +5237,7 @@ is-whitespace-character@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-whitespace-character/-/is-whitespace-character-1.0.2.tgz#ede53b4c6f6fb3874533751ec9280d01928d03ed"
 
-is-windows@^1.0.2:
+is-windows@^1.0.0, is-windows@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"