RUBY-30747 updated testing matrix

See #236

Author: hurricup

.travis.yml

@@ -4,34 +4,32 @@ matrix:
   fast_finish: true
   include:
     - os: linux
-      rvm: 3.0.1
+      rvm: 3.2
     - os: osx
-      rvm: 3.0.1
+      rvm: 3.2
     - os: linux
-      rvm: 2.7.3
+      rvm: 3.1
     - os: osx
-      rvm: 2.7.3
+      rvm: 3.1
     - os: linux
-      rvm: 2.6.7
+      rvm: 3.0
     - os: osx
-      rvm: 2.6.7
+      rvm: 3.0
     - os: linux
-      rvm: 2.5.9
+      rvm: 2.7
     - os: osx
-      rvm: 2.5.9
+      rvm: 2.7
     - os: linux
-      rvm: 2.4.10
+      rvm: 2.6
     - os: osx
-      rvm: 2.4.10
+      rvm: 2.6
     - os: linux
-      rvm: 2.3.8
-    - os: linux
-      rvm: 2.2.10
-    - os: linux
-      rvm: 2.1.10
-    - os: linux
-      rvm: 2.0.0
+      rvm: 2.5
+    - os: osx
+      rvm: 2.5
     - os: linux
-      rvm: 1.9.3
+      rvm: 2.4
+    - os: osx
+      rvm: 2.4
     - os: linux
-      rvm: 1.8.7
+      rvm: 2.3