chore: Update hashdiff requirement from ~> 1.1.0 to ~> 1.2.0 (#1071)

Updates the requirements on [hashdiff](https://github.com/liufengyun/hashdiff) to permit the latest version.
- [Changelog](https://github.com/liufengyun/hashdiff/blob/master/changelog.md)
- [Commits](liufengyun/hashdiff@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: hashdiff
  dependency-version: 1.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile

@@ -17,7 +17,7 @@ gemspec
 
 gem 'appium_thor', '~> 2.0'
 gem 'fakefs', '~> 3.0.0'
-gem 'hashdiff', '~> 1.1.0'
+gem 'hashdiff', '~> 1.2.0'
 gem 'minitest', '~> 5.0'
 gem 'minitest-reporters', '~> 1.1'
 gem 'pry'