Laravel 5.6 updates

Travis config update

Removed HHVM script as Laravel no longer support HHVM after releasing 5.3

vendor/phpunit/php-timer/build.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project name="php-timer" default="setup">
+    <target name="setup" depends="clean,composer"/>
+
+    <target name="clean" description="Cleanup build artifacts">
+        <delete dir="${basedir}/vendor"/>
+        <delete file="${basedir}/composer.lock"/>
+    </target>
+
+    <target name="composer" depends="clean" description="Install dependencies with Composer">
+        <exec executable="composer" taskname="composer">
+            <arg value="update"/>
+            <arg value="--no-interaction"/>
+            <arg value="--no-progress"/>
+            <arg value="--no-ansi"/>
+            <arg value="--no-suggest"/>
+        </exec>
+    </target>
+</project>
+