Update gems & GH Actions to Ruby 3.0.2

See https://hub.docker.com/_/ruby?tab=tags&page=1&name=3.0
and https://github.com/ruby/setup-ruby/blob/v1.84.0/README.md

Author: katrinleinweber

.github/workflows/rubocop.yml

@@ -14,9 +14,9 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e27aee156d42e38ff8a4c2fc97b125c4087cbcc7
+        uses: ruby/setup-ruby@b00551441a6fa3d528f3443dbff264a934b6e316
         with:
-          ruby-version: 2.6.6
+          ruby-version: 3.0.2
           bundler-cache: true
 
       - name: Install gems

.github/workflows/tests.yml

@@ -16,9 +16,9 @@ jobs:
 
       # Setup Ruby - this needs to match the version in the Gemfile
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e27aee156d42e38ff8a4c2fc97b125c4087cbcc7
+        uses: ruby/setup-ruby@b00551441a6fa3d528f3443dbff264a934b6e316
         with:
-          ruby-version: 2.6.6
+          ruby-version: 3.0.2
           bundler-cache: true
 
       # Setup code climate

.ruby-version

@@ -1 +1 @@
-ruby-2.6.6
+ruby-3.0.2

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.5-alpine
+FROM ruby:3.0.2-alpine
 
 RUN apk update && apk upgrade && \
     apk add --no-cache bash git openssh && \
@@ -10,7 +10,7 @@ RUN wget -P /usr/local/bin https://github.com/exercism/tooling-webserver/release
 WORKDIR /opt/test-runner
 
 COPY Gemfile Gemfile.lock ./
-RUN gem install bundler:2.1.4 && \
+RUN gem install bundler:2.2.29 && \
     bundle config set without 'development test' && \
     bundle install
 

Gemfile

@@ -5,9 +5,9 @@ git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
 end
 
-gem 'mandate'
+gem 'mandate', '~> 1.0.0.beta1'
 gem 'rake'
-gem 'json'
+gem 'json', '~> 2.6.1'
 gem 'minitest', '~> 5.11.3'
 
 gem 'parser'

Gemfile.lock

@@ -1,16 +1,16 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.1)
+    ast (2.4.2)
     coderay (1.1.3)
     docile (1.3.2)
-    json (2.2.0)
-    mandate (0.3.0)
+    json (2.6.1)
+    mandate (1.0.0.beta1)
     method_source (1.0.0)
     minitest (5.11.3)
     mocha (1.11.2)
     parallel (1.19.2)
-    parser (2.7.1.4)
+    parser (3.0.2.0)
       ast (~> 2.4.1)
     pry (0.13.1)
       coderay (~> 1.1)
@@ -46,8 +46,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  json
-  mandate
+  json (~> 2.6.1)
+  mandate (~> 1.0.0.beta1)
   minitest (~> 5.11.3)
   mocha
   parser
@@ -60,4 +60,4 @@ DEPENDENCIES
   simplecov (~> 0.17.0)
 
 BUNDLED WITH
-   2.1.4
+   2.2.29