[Composer] Bump guzzlehttp/guzzle to version 7 to suppress deprecation notices

- Bump divineomega/password_exposed to version 3 to remove dependency on Guzzle version 6
- Add new ICanHandleHttpResponses->getBodyString method to solve inheritance mismatch with GuzzleHttp\Psr7\ResponseInterface->getBody return type

src/Core/Logger/Handler/ErrorHandler.php

@@ -263,7 +263,7 @@ class ErrorHandler
 	public function handleError(int $code, string $message, string $file = '', int $line = 0, ?array $context = []): bool
 	{
 		if ($this->handleOnlyReportedErrors && !(error_reporting() & $code)) {
-			return false;
+			return true;
 		}
 
 		// fatal error codes are ignored if a fatal error handler is present as well to avoid duplicate log entries

src/Core/Search.php

@@ -234,7 +234,7 @@ class Search
 			$p = $page > 1 ? 'p=' . $page : '';
 			$curlResult = DI::httpClient()->get(self::getGlobalDirectory() . '/search/people?' . $p . '&q=' . urlencode($search), HttpClientAccept::JSON);
 			if ($curlResult->isSuccess()) {
-				$searchResult = json_decode($curlResult->getBody(), true);
+				$searchResult = json_decode($curlResult->getBodyString(), true);
 				if (!empty($searchResult['profiles'])) {
 					// Converting Directory Search results into contact-looking records
 					$return = array_map(function ($result) {

src/Core/Storage/Type/ExternalResource.php

@@ -70,12 +70,12 @@ class ExternalResource implements ICanReadFromStorage
 		}
 		if (!empty($fetchResult) && $fetchResult->isSuccess()) {
 			$this->logger->debug('Got picture', ['Content-Type' => $fetchResult->getHeader('Content-Type'), 'uid' => $data->uid, 'url' => $data->url]);
-			return $fetchResult->getBody();
+			return $fetchResult->getBodyString();
 		} else {
 			if (empty($fetchResult)) {
 				throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference));
 			} else {
-				throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $fetchResult->getReturnCode(), new Exception($fetchResult->getBody()));
+				throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $fetchResult->getReturnCode(), new Exception($fetchResult->getBodyString()));
 			}
 		}
 	}

src/Core/System.php

@@ -230,7 +230,7 @@ class System
 	 * @param int     $offset  How many calls to shave off the top of the stack, for example if
 	 *                         this is called from a centralized method that isn't relevant to the callstack
 	 * @param bool    $full    If enabled, the callstack is not compacted
-	 * @param array   $exclude 
+	 * @param array   $exclude
 	 * @return string
 	 */
 	public static function callstack(int $depth = 4, int $offset = 0, bool $full = false, array $exclude = []): string