.travis.yml in dbee-2.0.1 vs .travis.yml in dbee-2.0.2

@@ -2,9 +2,10 @@
   global:
     - CC_TEST_REPORTER_ID=e7db23dad7560a076e48357331b0362db3741b62dbdd537bc30de27fa9cab69b
 language: ruby
 rvm:
   # Build on the latest stable of all supported Rubies (https://www.ruby-lang.org/en/downloads/):
+  - 2.3.8
   - 2.4.6
   - 2.5.5
   - 2.6.3
 cache: bundler
 before_script: