Update dependabot ignore list (#2629)

* Update dependabot ignore list

This file hasn't been updated in quite some time.

Recently, we have updated all faker dependencies. For instance,
all of the versions included here were outdated.

To make sure we are always in sync with our dependencies, let's
configure our dependabot to always open PR for all of them.

* Explicitely tell the simplecov version

* Add space at the end of the file

.github/dependabot.yml

@@ -5,25 +5,4 @@ updates:
   schedule:
     interval: daily
   open-pull-requests-limit: 10
-  ignore:
-  - dependency-name: test-unit
-    versions:
-    - 3.3.9
-    - 3.4.1
-  - dependency-name: i18n
-    versions:
-    - 1.8.10
-    - 1.8.7
-    - 1.8.8
-  - dependency-name: simplecov
-    versions:
-    - 0.21.2
-  - dependency-name: rubocop
-    versions:
-    - 1.10.0
-    - 1.8.1
-    - 1.9.0
-    - 1.9.1
-  - dependency-name: timecop
-    versions:
-    - 0.9.3
+

faker.gemspec

@@ -35,7 +35,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency('rubocop', '1.38.0')
   spec.add_development_dependency('rubocop-minitest', '0.23.2')
   spec.add_development_dependency('rubocop-rake', '0.6.0')
-  spec.add_development_dependency('simplecov', '0.21')
+  spec.add_development_dependency('simplecov', '0.21.0')
   spec.add_development_dependency('test-unit', '3.5.5')
   spec.add_development_dependency('timecop', '0.9.5')
   spec.add_development_dependency('yard', '0.9.27')