deps: asn1.js@^5.3.0

upgraded asn1.js for buffer deprecation warning

Closes: #36
PR-URL: #35

Author: realanmup

package.json

@@ -31,7 +31,7 @@
   },
   "homepage": "https://github.com/Brightspace/node-jwk-to-pem#readme",
   "dependencies": {
-    "asn1.js": "^4.5.2",
+    "asn1.js": "^5.3.0",
     "elliptic": "^6.5.2",
     "safe-buffer": "^5.0.1"
   },