fix: update axios peer dependecy

Fix #15

Author: schettino

example/package.json

@@ -7,7 +7,7 @@
     "@types/node": "10.12.18",
     "@types/react": "16.7.20",
     "@types/react-dom": "16.0.11",
-    "axios": "^0.18.0",
+    "axios": "^0.18.1",
     "grommet": "2.4.0",
     "react": "16.8.1",
     "react-dom": "16.8.1",

package.json

@@ -26,7 +26,7 @@
     "fast-deep-equal": "^2.0.1"
   },
   "peerDependencies": {
-    "axios": "^0.18.0",
+    "axios": "^0.18.1",
     "react": "^16.8.2",
     "react-dom": "^16.8.2"
   },