appveyor.yml in iev-0.2.2 vs appveyor.yml in iev-0.2.3

@@ -1,12 +1,17 @@
+# Auto-generated !!! Do not edit it manually
+# use ci-master https://github.com/metanorma/metanorma-build-scripts
 version: '{build}'
 
+cache:
+  - vendor/bundle
+
 environment:
   matrix:
+    - RUBY_VERSION: 26
     - RUBY_VERSION: 25
     - RUBY_VERSION: 24
-    - RUBY_VERSION: 23
     - RUBY_VERSION: _trunk
 
 matrix:
   allow_failures:
     - RUBY_VERSION: _trunk
@@ -15,16 +20,18 @@
   - ps: . { iwr -useb https://raw.githubusercontent.com/metanorma/metanorma-build-scripts/master/appveyor.ps1 } | iex
   - refreshenv
 
 build_script:
   - set PATH=C:\Ruby%RUBY_VERSION%\bin;%PATH%
+  - set GIT_TERMINAL_PROMPT=0
+  - gem install bundler -v "~> 2"
+  - bundle config --local path vendor/bundle
   - bundle update
   - bundle install
 
 before_test:
   - ruby -v
   - gem -v
   - bundle -v
 
 test_script:
   - bundle exec rake
-