refactor: Extension of #231. Destructuring to combine imports (#237)

* refactor: Destructure imports together from same source in example util-crypto 01

* refactor: Destructure imports together example util-crypto 02. Avoid using default import. Show data to user

* refactor: Destructure imports together example util-crypto 03. Show data to user

* refactor: Split import over two lines looks cleaner

* fix: Address review comments. Update dependencies in examples

docs/examples/util-crypto/01_encrypt_decrypt_message_nacl/index.js

@@ -1,5 +1,4 @@
-const { naclEncrypt } = require('@polkadot/util-crypto');
-const { naclDecrypt } = require('@polkadot/util-crypto');
+const { naclEncrypt, naclDecrypt } = require('@polkadot/util-crypto');
 
 async function main () {
   const secret = new Uint8Array(32);

docs/examples/util-crypto/01_encrypt_decrypt_message_nacl/package.json

@@ -10,7 +10,7 @@
     "start": "node index.js"
   },
   "dependencies": {
-    "@polkadot/util-crypto": "^0.32.2"
+    "@polkadot/util-crypto": "^0.32.10"
   },
   "devDependencies": {
     "rimraf": "^2.6.2"