webdriver: Update version number for release

Source-Repo: https://github.com/mozilla/webdriver-rust
Source-Revision: b4b3ec9ef00b030d09f226fcb7cd97f61725195c

committer: Andreas Tolfsen <ato@mozilla.com>

--HG--
extra : subtree_source : http%3A//tristan.corp.lon2.mozilla.com%3A8000
extra : subtree_revision : 119f19fe6b4a28137b43265ff4eb5d2a8ddc2d40

testing/webdriver/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "webdriver"
-version = "0.23.1"
+version = "0.24.0"
 authors = ["Mozilla Tools and Automation <tools@lists.mozilla.com>"]
 description = "Library implementing the wire protocol for the W3C WebDriver specification"
 documentation = "https://docs.rs/webdriver"