Merge #73: Update build badge to use GitHub badge

d8e339c Update build badge to use GitHub badge (dandroid)

Pull request description:

  The current build badge using Travis is not working anymore.
  This PR uses the badge from GitHub instead.

ACKs for top commit:
  afilini:
    ACK d8e339c

Tree-SHA512: c08b5dc4b0d6bc0915843d95bfcf84c62317bb8a210f219feca31ce622b2f2b1241ae7987f5c395a980c6b2b3defc48227d43e8491e1adeafadc6e71ecde0db1

Author: afilini

README.md

@@ -1,9 +1,8 @@
-# rust-electrum-client [![Build Status]][travis] [![Latest Version]][crates.io]
+# rust-electrum-client [![Build Status]][GitHub Workflow] [![Latest Version]][crates.io]
 
-[Build Status]: https://api.travis-ci.org/MagicalBitcoin/rust-electrum-client.svg?branch=master
-[travis]: https://travis-ci.org/MagicalBitcoin/rust-electrum-client
+[Build Status]: https://github.com/bitcoindevkit/rust-electrum-client/actions/workflows/cont_integration.yml/badge.svg
+[GitHub Workflow]: https://github.com/bitcoindevkit/rust-electrum-client/actions?query=workflow%3ACI
 [Latest Version]: https://img.shields.io/crates/v/electrum-client.svg
 [crates.io]: https://crates.io/crates/electrum-client
 
-
 Bitcoin Electrum client library. Supports plaintext, TLS and Onion servers.