.travis.yml in jekyll-diagrams-0.9.1 vs .travis.yml in jekyll-diagrams-0.9.2

@@ -1,3 +1,50 @@
 language: ruby
 
-dist: bionic
\ No newline at end of file
+dist: bionic
+
+cache:
+ - apt
+ - bundler
+ - npm
+
+rvm:
+  - 2.5
+  - 2.6
+  - 2.7
+
+addons:
+  apt:
+    update: true
+    packages:
+      - build-essential
+      - git
+      - cabal-install
+      - cargo
+      - default-jre-headless
+      - graphviz
+      - npm
+      - libatk1.0-0
+      - libatk-bridge2.0-0
+      - libgif-dev
+      - libgtk-3-0
+      - libx11-xcb1
+      - libxcomposite1
+      - libxrandr2
+      - libxss1
+      - libpango1.0-dev
+      - libpython3-dev
+      - python3-pip
+      - python3-setuptools
+      - python3-cairo
+      - python3-gi
+      - python3-gi-cairo
+      - ruby-full
+
+before_install:
+  - sudo cargo install --root /usr/local svgbob_cli
+  - gem update --no-document --system
+  - gem install --no-document bundler
+  - npm install -g --silent mermaid.cli nomnoml state-machine-cat vega-cli vega-lite wavedrom-cli
+  - pip3 install syntrax blockdiag seqdiag actdiag nwdiag
+
+script: bundle exec rake