support php 7.3

Author: clarkeash

.travis.yml

@@ -6,18 +6,29 @@ matrix:
     env: ILLUMINATE_MINOR_VERSION=5 PHP_UNIT=6.0
   - php: 7.2
     env: ILLUMINATE_MINOR_VERSION=5 PHP_UNIT=6.0
+  - php: 7.3
+    env: ILLUMINATE_MINOR_VERSION=5 PHP_UNIT=6.0
+    
   - php: 7.1
     env: ILLUMINATE_MINOR_VERSION=6 PHP_UNIT=7.0
   - php: 7.2
     env: ILLUMINATE_MINOR_VERSION=6 PHP_UNIT=7.0
+  - php: 7.3
+    env: ILLUMINATE_MINOR_VERSION=6 PHP_UNIT=7.0
+    
   - php: 7.1
     env: ILLUMINATE_MINOR_VERSION=7 PHP_UNIT=7.0
   - php: 7.2
     env: ILLUMINATE_MINOR_VERSION=7 PHP_UNIT=7.0
+  - php: 7.3
+    env: ILLUMINATE_MINOR_VERSION=7 PHP_UNIT=7.0
+    
   - php: 7.1
     env: ILLUMINATE_MINOR_VERSION=8 PHP_UNIT=7.0
   - php: 7.2
     env: ILLUMINATE_MINOR_VERSION=8 PHP_UNIT=7.0
+  - php: 7.3
+    env: ILLUMINATE_MINOR_VERSION=8 PHP_UNIT=7.0
 
 cache:
   directories: