Since InstalledVersions changed API completely in composer-plugin-api:^2.1.0, we need to cast results to (string)

Ocramius · Ocramius · commit b598df57e631 · 2021-06-09T12:10:48.000+02:00
diff --git a/src/ProxyManager/Version.php b/src/ProxyManager/Version.php
@@ -34,7 +34,7 @@ private function __construct()
      */
     public static function getVersion(): string
     {
-        return InstalledVersions::getPrettyVersion('ocramius/proxy-manager')
-            . '@' . InstalledVersions::getReference('ocramius/proxy-manager');
+        return (string) InstalledVersions::getPrettyVersion('ocramius/proxy-manager')
+            . '@' . (string) InstalledVersions::getReference('ocramius/proxy-manager');
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@ private function __construct()`
`34`	`34`	`*/`
`35`	`35`	`public static function getVersion(): string`
`36`	`36`	`{`
`37`		`- return InstalledVersions::getPrettyVersion('ocramius/proxy-manager')`
`38`		`- . '@' . InstalledVersions::getReference('ocramius/proxy-manager');`
	`37`	`+ return (string) InstalledVersions::getPrettyVersion('ocramius/proxy-manager')`
	`38`	`+ . '@' . (string) InstalledVersions::getReference('ocramius/proxy-manager');`
`39`	`39`	`}`
`40`	`40`	`}`