Bug 1391605 - Bump geckodriver to 0.19.0. r=ato

MozReview-Commit-ID: 4ai3ShcNhdS

--HG--
extra : rebase_source : bd255ed9864e484cb3ac395d999d5d5ac6c44425

testing/geckodriver/Cargo.lock

@@ -1,6 +1,6 @@
 [root]
 name = "geckodriver"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "chrono 0.2.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.24.2 (registry+https://github.com/rust-lang/crates.io-index)",

testing/geckodriver/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "geckodriver"
-version = "0.18.0"
+version = "0.19.0"
 authors = [
   "James Graham <james@hoppipolla.co.uk>",
   "Andreas Tolfsen <ato@sny.no>",