Add ts-check for examples (#705)

* Add ts-check for examples

* Typing cleanups, now shows properly

* Bump

* Cleanup checks

* Bump keyring

docs/examples/promise/01_simple_connect/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Required imports
 const { ApiPromise } = require('@polkadot/api');
 const { WsProvider } = require('@polkadot/rpc-provider');

docs/examples/promise/02_listen_to_blocks/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/03_listen_to_balance_change/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/04_unsubscribe/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/05_read_storage/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/06_make_transfer/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API, Keyring and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 const { Keyring } = require('@polkadot/keyring');

docs/examples/promise/08_system_events/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/09_transfer_events/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API & Provider and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/10_upgrade_chain/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 // Import the API & Provider and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 const { WsProvider } = require('@polkadot/rpc-provider');