StyleCi fixes

As reported: https://styleci.io/analyses/qxKNJB in PR: geocoder-php/Geocoder#798

Author: leevigraham

Exception/InvalidServerResponse.php

@@ -25,7 +25,7 @@ final class InvalidServerResponse extends \RuntimeException implements Exception
      *
      * @return InvalidServerResponse
      */
-    public static function create(string $query, int $code = 0): InvalidServerResponse
+    public static function create(string $query, int $code = 0): self
     {
         return new self(sprintf('The geocoder server returned an invalid response (%d) for query "%s". We could not parse it.', $code, $query));
     }
@@ -35,7 +35,7 @@ public static function create(string $query, int $code = 0): InvalidServerRespon
      *
      * @return InvalidServerResponse
      */
-    public static function emptyResponse(string $query): InvalidServerResponse
+    public static function emptyResponse(string $query): self
     {
         return new self(sprintf('The geocoder server returned an empty response for query "%s".', $query));
     }

Query/GeocodeQuery.php

@@ -65,7 +65,7 @@ private function __construct(string $text)
      *
      * @return GeocodeQuery
      */
-    public static function create(string $text): GeocodeQuery
+    public static function create(string $text): self
     {
         return new self($text);
     }
@@ -75,7 +75,7 @@ public static function create(string $text): GeocodeQuery
      *
      * @return GeocodeQuery
      */
-    public function withText(string $text): GeocodeQuery
+    public function withText(string $text): self
     {
         $new = clone $this;
         $new->text = $text;
@@ -88,7 +88,7 @@ public function withText(string $text): GeocodeQuery
      *
      * @return GeocodeQuery
      */
-    public function withBounds(Bounds $bounds): GeocodeQuery
+    public function withBounds(Bounds $bounds): self
     {
         $new = clone $this;
         $new->bounds = $bounds;
@@ -101,7 +101,7 @@ public function withBounds(Bounds $bounds): GeocodeQuery
      *
      * @return GeocodeQuery
      */
-    public function withLocale(string $locale): GeocodeQuery
+    public function withLocale(string $locale): self
     {
         $new = clone $this;
         $new->locale = $locale;
@@ -114,7 +114,7 @@ public function withLocale(string $locale): GeocodeQuery
      *
      * @return GeocodeQuery
      */
-    public function withLimit(int $limit): GeocodeQuery
+    public function withLimit(int $limit): self
     {
         $new = clone $this;
         $new->limit = $limit;
@@ -128,7 +128,7 @@ public function withLimit(int $limit): GeocodeQuery
      *
      * @return GeocodeQuery
      */
-    public function withData(string $name, $value): GeocodeQuery
+    public function withData(string $name, $value): self
     {
         $new = clone $this;
         $new->data[$name] = $value;

Query/ReverseQuery.php

@@ -64,7 +64,7 @@ public static function create(Coordinates $coordinates)
      *
      * @return ReverseQuery
      */
-    public static function fromCoordinates($latitude, $longitude): ReverseQuery
+    public static function fromCoordinates($latitude, $longitude): self
     {
         return new self(new Coordinates($latitude, $longitude));
     }
@@ -74,7 +74,7 @@ public static function fromCoordinates($latitude, $longitude): ReverseQuery
      *
      * @return ReverseQuery
      */
-    public function withCoordinates(Coordinates $coordinates): ReverseQuery
+    public function withCoordinates(Coordinates $coordinates): self
     {
         $new = clone $this;
         $new->coordinates = $coordinates;
@@ -87,7 +87,7 @@ public function withCoordinates(Coordinates $coordinates): ReverseQuery
      *
      * @return ReverseQuery
      */
-    public function withLimit(int $limit): ReverseQuery
+    public function withLimit(int $limit): self
     {
         $new = clone $this;
         $new->limit = $limit;
@@ -100,7 +100,7 @@ public function withLimit(int $limit): ReverseQuery
      *
      * @return ReverseQuery
      */
-    public function withLocale(string $locale): ReverseQuery
+    public function withLocale(string $locale): self
     {
         $new = clone $this;
         $new->locale = $locale;
@@ -114,7 +114,7 @@ public function withLocale(string $locale): ReverseQuery
      *
      * @return ReverseQuery
      */
-    public function withData(string $name, $value): ReverseQuery
+    public function withData(string $name, $value): self
     {
         $new = clone $this;
         $new->data[$name] = $value;