added php 7.2 && nightly in travis

removed hhvm in travis

Author: kokspflanze

.travis.yml

@@ -58,17 +58,27 @@ matrix:
     - php: 7.1
       env:
         - DEPS=latest
-    - php: hhvm 
+    - php: 7.2
       env:
         - DEPS=lowest
-    - php: hhvm 
+    - php: 7.2
       env:
         - DEPS=locked
-    - php: hhvm 
+    - php: 7.2
+      env:
+        - DEPS=latest
+    - php: nightly
+      env:
+        - DEPS=lowest
+    - php: nightly
+      env:
+        - DEPS=locked
+    - php: nightly
       env:
         - DEPS=latest
   allow_failures:
-    - php: hhvm
+    - php: 7.2
+    - php: nightly
 
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