Add missing supportsMatrixSpecVersion QML function

This was rebased out or something in 197d7ce8e8

src/libneochat/neochatconnection.cpp

@@ -608,4 +608,9 @@ void NeoChatConnection::reportUser(const QString &userId, const QString &reason)
     callApi<NeochatReportUserJob>(userId, reason);
 }
 
+bool NeoChatConnection::supportsMatrixSpecVersion(const QString &version)
+{
+    return supportedMatrixSpecVersions().contains(version);
+}
+
 #include "moc_neochatconnection.cpp"

src/libneochat/neochatconnection.h

@@ -229,6 +229,11 @@ public:
       */
     Q_INVOKABLE void reportUser(const QString &userId, const QString &reason);
 
+    /**
+     * @return True if this connection supports the given spec version (e.g. "v1.11").
+     */
+    Q_INVOKABLE bool supportsMatrixSpecVersion(const QString &version);
+
 Q_SIGNALS:
     void globalUrlPreviewEnabledChanged();
     void labelChanged();