Bump Ruby back down to 2.6.3

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Set up Ruby
       uses: actions/setup-ruby@v1
       with:
-        ruby-version: 2.6.x
+        ruby-version: 2.6.3
 
     - name: Set up reporter
       run: |

.ruby-version

@@ -1 +1 @@
-2.6.5
+2.6.3

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.6.5
+FROM ruby:2.6.3
 
 RUN mkdir /app
 WORKDIR /app

Gemfile

@@ -2,7 +2,7 @@
 
 source 'http://rubygems.org'
 
-ruby '2.6.5'
+ruby '2.6.3'
 
 gem 'money'
 gem 'oj'

Gemfile.lock

@@ -112,7 +112,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 2.6.5p114
+   ruby 2.6.3p62
 
 BUNDLED WITH
    2.0.2