Make sure we use PHP7 and PHPunit 6 (#635)

* Make sure we use PHP7 and PHPunit 6

* Remove HHVM support

* cs

Author: Nyholm

Tests/Dumper/GeoArrayTest.php

@@ -12,11 +12,12 @@
 
 use Geocoder\Dumper\GeoArray;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Tomas Norkūnas <norkunas.tom@gmail.com>
  */
-class GeoArrayTest extends \PHPUnit_Framework_TestCase
+class GeoArrayTest extends TestCase
 {
     /**
      * @var GeoArray

Tests/Dumper/GeoJsonTest.php

@@ -12,12 +12,13 @@
 
 use Geocoder\Dumper\GeoJson;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Jan Sorgalla <jsorgalla@googlemail.com>
  * @author William Durand <william.durand1@gmail.com>
  */
-class GeoJsonTest extends \PHPUnit_Framework_TestCase
+class GeoJsonTest extends TestCase
 {
     /**
      * @var GeoJson

Tests/Dumper/GpxTest.php

@@ -13,11 +13,12 @@
 use Geocoder\Geocoder;
 use Geocoder\Dumper\Gpx;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author William Durand <william.durand1@gmail.com>
  */
-class GpxTest extends \PHPUnit_Framework_TestCase
+class GpxTest extends TestCase
 {
     /**
      * @var Gpx

Tests/Dumper/KmlTest.php

@@ -12,12 +12,13 @@
 
 use Geocoder\Dumper\Kml;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Jan Sorgalla <jsorgalla@googlemail.com>
  * @author William Durand <william.durand1@gmail.com>
  */
-class KmlTest extends \PHPUnit_Framework_TestCase
+class KmlTest extends TestCase
 {
     /**
      * @var Kml

Tests/Dumper/WkbTest.php

@@ -12,12 +12,13 @@
 
 use Geocoder\Dumper\Wkb;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Jan Sorgalla <jsorgalla@googlemail.com>
  * @author William Durand <william.durand1@gmail.com>
  */
-class WkbTest extends \PHPUnit_Framework_TestCase
+class WkbTest extends TestCase
 {
     /**
      * @var Wkb

Tests/Dumper/WktTest.php

@@ -12,12 +12,13 @@
 
 use Geocoder\Dumper\Wkt;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Jan Sorgalla <jsorgalla@googlemail.com>
  * @author William Durand <william.durand1@gmail.com>
  */
-class WktTest extends \PHPUnit_Framework_TestCase
+class WktTest extends TestCase
 {
     /**
      * @var Wkt

Tests/Formatter/StringFormatterTest.php

@@ -12,11 +12,12 @@
 
 use Geocoder\Formatter\StringFormatter;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author William Durand <william.durand1@gmail.com>
  */
-class StringFormatterTest extends \PHPUnit_Framework_TestCase
+class StringFormatterTest extends TestCase
 {
     /**
      * @var StringFormatter

Tests/Model/AddressCollectionTest.php

@@ -11,11 +11,12 @@
 namespace Geocoder\Tests\Model;
 
 use Geocoder\Model\AddressCollection;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  */
-class AddressCollectionTest extends \PHPUnit_Framework_TestCase
+class AddressCollectionTest extends TestCase
 {
     /**
      * @expectedException \Geocoder\Exception\CollectionIsEmpty

Tests/Model/AddressTest.php

@@ -12,11 +12,12 @@
 
 use Geocoder\Model\Address;
 use Geocoder\Model\LocationFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Antoine Lemaire <lemaireantoine@hotmail.com>
  */
-class AddressTest extends \PHPUnit_Framework_TestCase
+class AddressTest extends TestCase
 {
     public function testDumpEmptyAddress()
     {

Tests/Model/LocationFactoryTest.php

@@ -13,12 +13,13 @@
 use Geocoder\Model\AddressCollection;
 use Geocoder\Model\LocationFactory;
 use Geocoder\Location;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @author Antoine Corcy <contact@sbin.dk>
  * @author William Durand <william.durand1@gmail.com>
  */
-class LocationFactoryTest extends \PHPUnit_Framework_TestCase
+class LocationFactoryTest extends TestCase
 {
     public function testCreateFromArray()
     {