Merge rubygems#199

199: Update rack-test requirement from ~> 0.6 to ~> 1.1 r=bronzdoc a=dependabot[bot]

Updates the requirements on [rack-test](https://github.com/rack-test/rack-test) to permit the latest version.
<details>
<summary>Release notes</summary>

*Sourced from [rack-test's releases](https://github.com/rack-test/rack-test/releases).*

> ## v1.1.0
> ## 1.1.0 / 2018-07-21
> 
> * Breaking changes:
>   * None
> 
> * Minor enhancements / new functionality:
>   * [GitHub] Added configuration for Stale (Per Lundberg [rubygems#232](https://github-redirect.dependabot.com/rack-test/rack-test/issues/232))
>   * `follow_direct`: Include `rack.session.options` (Mark Edmondson [rubygems#233](https://github-redirect.dependabot.com/rack-test/rack-test/issues/233))
>   * [CI] Add simplecov (fatkodima [rubygems#227](https://github-redirect.dependabot.com/rack-test/rack-test/issues/227))
> 
> Bug fixes:
>   * Follow relative locations correctly. (Samuel Williams [rubygems#230](https://github-redirect.dependabot.com/rack-test/rack-test/issues/230))
</details>
<details>
<summary>Changelog</summary>

*Sourced from [rack-test's changelog](https://github.com/rack-test/rack-test/blob/master/History.md).*

> ## 1.1.0 / 2018-07-21
> 
> * Breaking changes:
>   * None
> 
> * Minor enhancements / new functionality:
>   * [GitHub] Added configuration for Stale (Per Lundberg [rubygems#232](https://github-redirect.dependabot.com/rack-test/rack-test/issues/232))
>   * follow_direct: Include rack.session.options (Mark Edmondson [rubygems#233](https://github-redirect.dependabot.com/rack-test/rack-test/issues/233))
>   * [CI] Add simplecov (fatkodima [rubygems#227](https://github-redirect.dependabot.com/rack-test/rack-test/issues/227))
> 
> Bug fixes:
>   * Follow relative locations correctly. (Samuel Williams [rubygems#230](https://github-redirect.dependabot.com/rack-test/rack-test/issues/230))
> 
> ## 1.0.0 / 2018-03-27
> 
> * Breaking changes:
>   * Always set CONTENT_TYPE for non-GET requests
>     (Per Lundberg [rubygems#223](https://github-redirect.dependabot.com/rack-test/rack-test/issues/223))
> 
> * Minor enhancements / bug fixes:
>   * Create tempfile using the basename without extension
>     (Edouard Chin [rubygems#201](https://github-redirect.dependabot.com/rack-test/rack-test/issues/201))
>   * Save `session` during `follow_redirect!`
>     (Alexander Popov [rubygems#218](https://github-redirect.dependabot.com/rack-test/rack-test/issues/218))
>   * Document how to use URL params with DELETE method
>     (Timur Platonov [rubygems#220](https://github-redirect.dependabot.com/rack-test/rack-test/issues/220))
> 
> ## 0.8.3 / 2018-02-27
> 
> * Bug fixes:
>   * Do not set Content-Type if params are explicitly set to nil
>     (Bartek Bułat [rubygems#212](https://github-redirect.dependabot.com/rack-test/rack-test/issues/212)). Fixes [rubygems#200](https://github-redirect.dependabot.com/rack-test/rack-test/issues/200).
>   * Fix `UploadedFile#new` regression
>     (Per Lundberg [rubygems#215](https://github-redirect.dependabot.com/rack-test/rack-test/issues/215))
> 
> * Minor enhancements
>   * [CI] Test against Ruby 2.5 (Nicolas Leger [rubygems#217](https://github-redirect.dependabot.com/rack-test/rack-test/issues/217))
> 
> ## 0.8.2 / 2017-11-21
> 
> * Bug fixes:
>   * Bugfix for `UploadedFile.new` unintended API breakage.
>     (Per Lundberg [rubygems#210](https://github-redirect.dependabot.com/rack-test/rack-test/issues/210))
> 
> ## 0.8.0 / 2017-11-20
> 
> * Known Issue
>   * In `UploadedFile.new`, when passing e.g. a `Pathname` object,
>     errors can be raised (eg. `ArgumentError: Missing original_filename
>     for IO`, or `NoMethodError: undefined method 'size'`) See [rubygems#207](https://github-redirect.dependabot.com/rack-test/rack-test/issues/207), [rubygems#209](https://github-redirect.dependabot.com/rack-test/rack-test/issues/209).
></table> ... (truncated)
</details>
<details>
<summary>Commits</summary>

- See full diff in [compare view](https://github.com/rack-test/rack-test/commits/v1.1.0)
</details>
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Co-authored-by: dependabot[bot] <[email protected]>

gemstash.gemspec

@@ -55,7 +55,7 @@ you push your own private gems as well."
   spec.add_development_dependency "citrus", "~> 3.0"
   spec.add_development_dependency "octokit", "~> 4.2"
   spec.add_development_dependency "pandoc_object_filters", "~> 0.2"
-  spec.add_development_dependency "rack-test", "~> 0.6"
+  spec.add_development_dependency "rack-test", "~> 1.1"
   spec.add_development_dependency "rake", "~> 12.3"
   spec.add_development_dependency "rspec", "~> 3.3"
   spec.add_development_dependency "rubocop", "0.49"