Bump curb from 1.1.0 to 1.2.0

Bumps [curb](https://github.com/taf2/curb) from 1.1.0 to 1.2.0.
- [Changelog](https://github.com/taf2/curb/blob/master/ChangeLog.md)
- [Commits](https://github.com/taf2/curb/commits)

---
updated-dependencies:
- dependency-name: curb
  dependency-version: 1.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -74,7 +74,7 @@ group :test do
 
     # Note: curb gem requires curl libraries
     # sudo apt-get install libcurl4-openssl-dev
-    gem 'curb', '~> 1.1'
+    gem 'curb', '~> 1.2'
 
     # Note: selenium-webdriver 3.x is incompatible with Firefox version 48 and prior
     # gem 'selenium' # Requires old version of selenium which is no longer available

Gemfile.lock

@@ -53,7 +53,7 @@ GEM
       fiber-annotation
       fiber-local (~> 1.1)
       json
-    curb (1.1.0)
+    curb (1.2.0)
     daemons (1.4.1)
     date (3.4.1)
     diff-lcs (1.6.2)
@@ -295,7 +295,7 @@ DEPENDENCIES
   async-dns (~> 1.4)
   browserstack-local (~> 1.4)
   capybara (~> 3.40)
-  curb (~> 1.1)
+  curb (~> 1.2)
   em-websocket (~> 0.5.3)
   erubis (~> 2.7)
   espeak-ruby (~> 1.1.0)