更新IPUPeerTubePlugin.m文件，兼容js传的mapJson，以及callback回调传入长度大于0的字符串。

display-center/display-center/IPUPeerTubePlugin.m

@@ -33,6 +33,9 @@
        [self error:@"缺少必传参数!"];
        return;
    }
    if (![map[@"tokenJson"] isKindOfClass:[NSString class]]) {
        tokenJson = [IPUJSONHelper toJSONString:tokenJson];
    }
    
    NSString *hexColor = map[@"bdColor"] ?: @"";
    UIColor *color = [IPUColorUtility colorWithHexString:hexColor];
@@ -48,7 +51,7 @@
        if (!isSuccess) {
            [self error:@""];
        }else {
            [self callback:@""];
            [self callback:@"aa"]; //传空串的话，触发不了callback回调
        }
    }];
}
@@ -309,7 +312,7 @@ parmas[2]: 必传，count
    vc.playerType = IPUPeerTubeVideoPlayerTypeEmbedPath;
    vc.videoEmbedPath = embedPath;
    vc.backBlock = ^(){
        [self callback:@"aaa"];
        [self callback:@"aa"];
        NSLog(@"播放页面返回的CallBack～～！");
    };
    vc.modalPresentationStyle = UIModalPresentationFullScreen;