Bump govuk-lint from 3.8.0 to 3.9.0

Bumps [govuk-lint](https://github.com/alphagov/govuk-lint) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/alphagov/govuk-lint/releases)
- [Changelog](https://github.com/alphagov/govuk-lint/blob/master/CHANGELOG.md)
- [Commits](alphagov/govuk-lint@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -111,9 +111,9 @@ GEM
       money (~> 6.7)
       nokogiri (~> 1.5)
       sanitize (~> 4.6)
-    govuk-lint (3.8.0)
-      rubocop (~> 0.52.0)
-      rubocop-rspec (~> 1.19.0)
+    govuk-lint (3.9.0)
+      rubocop (~> 0.58)
+      rubocop-rspec (~> 1.28)
       scss_lint
     govuk_ab_testing (2.4.1)
     govuk_app_config (1.8.0)
@@ -144,6 +144,7 @@ GEM
       concurrent-ruby (~> 1.0)
     image_size (2.0.0)
     io-like (0.3.0)
+    jaro_winkler (1.5.1)
     jasmine-core (2.99.2)
     jasmine-rails (0.14.8)
       jasmine-core (>= 1.3, < 3.0)
@@ -192,11 +193,11 @@ GEM
       nokogiri
     null_logger (0.0.1)
     parallel (1.12.1)
-    parser (2.5.0.5)
+    parser (2.5.1.2)
       ast (~> 2.4.0)
     phantomjs (2.1.1.0)
     plek (2.1.1)
-    powerpack (0.1.1)
+    powerpack (0.1.2)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
@@ -259,16 +260,17 @@ GEM
       netrc (~> 0.8)
     robotex (1.0.0)
     rouge (3.2.1)
-    rubocop (0.52.1)
+    rubocop (0.58.2)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.4.0.2, < 3.0)
+      parser (>= 2.5, != 2.5.1.1)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    rubocop-rspec (1.19.0)
-      rubocop (>= 0.51.0)
-    ruby-progressbar (1.9.0)
+    rubocop-rspec (1.29.1)
+      rubocop (>= 0.58.0)
+    ruby-progressbar (1.10.0)
     rubyzip (1.2.2)
     safe_yaml (1.0.4)
     sanitize (4.6.6)
@@ -320,7 +322,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.5)
-    unicode-display_width (1.3.0)
+    unicode-display_width (1.4.0)
     unicorn (5.4.1)
       kgio (~> 2.6)
       raindrops (~> 0.7)