Fix PHP 7.4 code syntax issues

Signed-off-by: Christian Wolf <github@christianwolf.email>

lib/Helper/Filter/JSON/AbstractJSONFilter.php

@@ -26,7 +26,7 @@ abstract class AbstractJSONFilter {
 	/**
 	 * @param string|int|float|array $value
 	 */
-	protected function setJSONValue(array &$json, string $key, string|int|float|array $value): bool {
+	protected function setJSONValue(array &$json, string $key, $value): bool {
 		if (!array_key_exists($key, $json)) {
 			$json[$key] = $value;
 			return true;

lib/Helper/Filter/Output/RecipeStubFilter.php

@@ -12,7 +12,7 @@ class RecipeStubFilter {
 
 	public function __construct(
 		RecipeIdTypeFilter $recipeIdTypeFilter,
-		RecipeIdCopyFilter $recipeIdCopyFilter,
+		RecipeIdCopyFilter $recipeIdCopyFilter
 	) {
 		$this->filters = [
 			$recipeIdCopyFilter,

lib/Helper/TimestampHelper.php

@@ -45,7 +45,7 @@ class TimestampHelper {
 		// For now, we only support the ISO8601 format because it is required in the schema.org standard
 		try {
 			return $this->parseIsoFormat($timestamp);
-		} catch (InvalidTimestampException) {
+		} catch (InvalidTimestampException $ex) {
 			// We do nothing here. Check the next format
 		}
 
@@ -65,15 +65,15 @@ class TimestampHelper {
 	private function parseIsoFormat(string $timestamp): string {
 		try {
 			return $this->parseIsoCalendarDateFormat($timestamp, '-');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 		try {
 			return $this->parseIsoCalendarDateFormat($timestamp, '');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 		try {
 			return $this->parseIsoWeekDateFormat($timestamp, '-');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 
 		return $this->parseIsoWeekDateFormat($timestamp, '');