Introduce Changesets (#71)

and upgrade dependencies

Author: jossmac

.changeset/config.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@1.0.0/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "master"
+}

package.json

@@ -44,6 +44,7 @@
     "react": "^16.3.0"
   },
   "devDependencies": {
+    "@changesets/cli": "^2.6.1",
     "@types/react": "^16.8.20",
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.0",