chore: release v3.1.2 (#63)

Author: Michael Mok

package.json

@@ -6,7 +6,7 @@
     "bankid",
     "authentication"
   ],
-  "version": "3.1.1",
+  "version": "3.1.2",
   "main": "lib/bankid.js",
   "repository": {
     "type": "git",