Update shoulda-matchers requirement from ~> 2.8 to ~> 3.1

[dependabot]

Updates the requirements on shoulda-matchers to permit the latest version.

Changelog

Sourced from shoulda-matchers's changelog.

3.1.3 - 2019-01-29

Improvements

• Update BigDecimal.new() to use BigDecimal() and avoid deprecation warnings in Ruby 2.6.

3.1.2 - 2017-07-12

Deprecations

• This is the last version that supports Rails 4.0 and 4.1 and Ruby 2.0 and 2.1.

Bug fixes

• When the permit matcher was used without #on, the controller did not use params#require, the params object was duplicated, and the matcher did not recognize the #permit call inside the controller. This behavior happened because the matcher overwrote double registries with the same parameter hash whenever ActionController::Parameters was instantiated. (#899, #902, 44c019)

#899: thoughtbot/shoulda-matchers#899 #902: thoughtbot/shoulda-matchers#902

3.1.1 - 2016-01-28

Bug fixes

• Some matchers make use of ActiveSupport's in? method, but do not include the file where this is defined in ActiveSupport. This causes problems with projects using shoulda-matchers that do not include all of ActiveSupport by default. To fix this, replace in? with Ruby's builtin include?. (#879)

• validate_uniqueness_of works by creating a record if it doesn't exist, and then testing against a new record with various attributes set that are equal to (or different than) corresponding attributes in the existing record. In 3.1.0 a change was made whereby when the uniqueness matcher is given a new record and creates an existing record out of it, it ensures that the record is valid before continuing on. This created a problem because if the subject, before it was saved, was empty and therefore in an invalid state, it could not effectively be saved. While ideally this should be enforced, doing so would be a backward-incompatible change, so this behavior has been rolled back. (#880, #884, #885, [45de869])

• Fix an issue with validate_uniqueness_of + scoped_to when used against a model where the attribute has multiple uniqueness validations and each validation has a different set of scopes. In this case, a test written for the

... (truncated)

Commits

• 3fea799 Bump version to 3.1.3
• a126b56 Override the way gems are installed on Travis
• 86fab89 bundle update rdoc --full-index
• 6dd7c7e Add note about BigDecimal to NEWS
• d941102 Use BigDecimal() over BigDecimal.new
• 1201198 Merge pull request #1034 from guialbuk/add-deprecation-notice-to-news-md
• fe79af4 Add deprecation notice to NEWS.md
• 2becfea Merge pull request #1030 from gitter-badger/gitter-badge
• 3fa4c2e Add Gitter badge
• ac9f482 Merge pull request #1014 from guialbuk/rails-5-readme
• Additional commits viewable in compare view

Most Recent Ignore Conditions Applied to This Pull Request

Dependency Name	Ignore Conditions
shoulda-matchers	[>= 3.a, < 4]

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