Version 1.80.0

Drop support for the old non-smart Binance chain.

- Remove `BinanceSigner`
- Remove `SignedBinanceTxMiddleware`

package.json

@@ -5,7 +5,7 @@
     "name": "Loom Network",
     "url": "https://loomx.io"
   },
-  "version": "1.79.0",
+  "version": "1.80.0",
   "keywords": [
     "blockchain",
     "dappchain"