Update build ruby to 2.5.7

bhornseth · bhornseth · commit d1554b371ac3 · 2020-02-12T17:40:50.000-06:00
diff --git a/.ruby-version b/.ruby-version
@@ -1 +1 @@
-1.9.3
+2.5.7
diff --git a/.travis.yml b/.travis.yml
@@ -1,10 +1,8 @@
 language: ruby
 rvm:
-  - 1.9.3
-  - 2.1.6
-  - 2.2.4
+  - 2.5.7
 
 # Try to work around a travisCI quirk
 # see https://git.io/vVf62 for more
 before_install:
-  - gem install bundler
+  - gem install bundler -v 1.17.3
