Enable PHPStan Level 6 (#1194)

* Update phpstan.neon

* Update YandexTest.php

* Update TomTomTest.php

* Update PickPointTest.php

* Update PickPoint.php

* Update PhotonTest.php

* Update PeliasTest.php

* Update OpenRouteServiceTest.php

* Update OpenCageTest.php

* Update OpenCage.php

* Update NominatimTest.php

* Update MaxMindBinaryTest.php

* Update MaxMindTest.php

* [WIP] Apply PHPStan fixes

* Apply PHPCSFixer fixes

* [WIP] Apply PHPStan fixes

* [WIP] Apply PHPStan fixes

* Revert "[WIP] Apply PHPStan fixes"

This reverts commit 734c5c52fbcba4bc12cbda07b58d902a79d47891.

* [WIP] Apply PHPStan fixes

* [WIP] Apply PHPStan fixes

* Update phpstan-baseline.neon

Author: jbelien

Tests/GeoPluginTest.php

@@ -19,18 +19,18 @@
 
 class GeoPluginTest extends BaseTestCase
 {
-    protected function getCacheDir()
+    protected function getCacheDir(): string
     {
         return __DIR__.'/.cached_responses';
     }
 
-    public function testgetName()
+    public function testgetName(): void
     {
         $provider = new GeoPlugin($this->getMockedHttpClient());
         $this->assertEquals('geo_plugin', $provider->getName());
     }
 
-    public function testGeocodeWithAddress()
+    public function testGeocodeWithAddress(): void
     {
         $this->expectException(\Geocoder\Exception\UnsupportedOperation::class);
         $this->expectExceptionMessage('The GeoPlugin provider does not support street addresses, only IP addresses.');
@@ -39,7 +39,7 @@ public function testGeocodeWithAddress()
         $provider->geocodeQuery(GeocodeQuery::create('10 avenue Gambetta, Paris, France'));
     }
 
-    public function testGeocodeWithLocalhostIPv4()
+    public function testGeocodeWithLocalhostIPv4(): void
     {
         $provider = new GeoPlugin($this->getMockedHttpClient());
         $results = $provider->geocodeQuery(GeocodeQuery::create('127.0.0.1'));
@@ -52,7 +52,7 @@ public function testGeocodeWithLocalhostIPv4()
         $this->assertEquals('localhost', $result->getCountry()->getName());
     }
 
-    public function testGeocodeWithLocalhostIPv6()
+    public function testGeocodeWithLocalhostIPv6(): void
     {
         $provider = new GeoPlugin($this->getMockedHttpClient());
         $results = $provider->geocodeQuery(GeocodeQuery::create('::1'));
@@ -65,7 +65,7 @@ public function testGeocodeWithLocalhostIPv6()
         $this->assertEquals('localhost', $result->getCountry()->getName());
     }
 
-    public function testGeocodeWithRealIPv4()
+    public function testGeocodeWithRealIPv4(): void
     {
         $provider = new GeoPlugin($this->getHttpClient());
         $results = $provider->geocodeQuery(GeocodeQuery::create('66.147.244.214'));
@@ -85,7 +85,7 @@ public function testGeocodeWithRealIPv4()
         $this->assertEquals('US', $result->getCountry()->getCode());
     }
 
-    public function testReverse()
+    public function testReverse(): void
     {
         $this->expectException(\Geocoder\Exception\UnsupportedOperation::class);
         $this->expectExceptionMessage('The GeoPlugin provider is not able to do reverse geocoding.');