Update travis

Author: robertpustulka

.travis.yml

@@ -2,10 +2,10 @@ language: php
 dist: trusty
 
 php:
-  - 5.6
-  - 7.0
-  - 7.1
   - 7.2
+  - 7.3
+  - 7.4
+  - 8.0
 
 sudo: false
 
@@ -17,9 +17,9 @@ env:
 
 matrix:
   include:
-    - php: 7.1
+    - php: 7.2
       env: PHPCS=1 DEFAULT=0
-    - php: 7.1
+    - php: 7.2
       env: COVERALLS=1 DEFAULT=0 DB=mysql db_dsn='mysql://[email protected]/searchable_test'
 
 before_script: