fix(package): update react-spring to version 6.1.8

Closes #374

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "react-popper": "^1.0.0",
     "react-portal": "^4.1.4",
     "react-responsive": "^4.1.0",
-    "react-spring": "^5.6.11",
+    "react-spring": "^6.1.8",
     "react-vk": "^3.2.0",
     "react-yandex-metrika": "^2.3.0",
     "recompose": "^0.30.0",