Please remove UIWebView

[AVOGames]

As Apple stops receiving apps with deprecated UIWebView.

Here are the symbols from VerveAd framework.

alex@Alexeys-MacBook-Pro VerveAd.framework % nm -m VerveAd | egrep "UIWebView"                                   
000000000001afed (__TEXT,__text) non-external +[VRVMoatUIUtil digForUIWebView:allowMultiple:]
00000000000145e8 (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge .cxx_destruct]
000000000001437f (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge checkAndSendJS:]
000000000001444a (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge handleJSResponse:]
00000000000142c3 (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge initWithWebView:forNativeAds:]
00000000000145d4 (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge setWebView:]
00000000000145bb (__TEXT,__text) non-external -[VRVMoatUIWebViewBridge webView]
000000000001c30b (__TEXT,__text) non-external -[VRVMoatWebTracker installUIWebViewBridge]
00000000000039bd (__TEXT,__text) non-external -[Verve_AvidUIWebViewHolder .cxx_destruct]
0000000000003916 (__TEXT,__text) non-external -[Verve_AvidUIWebViewHolder injectJavascript:]
00000000000039a9 (__TEXT,__text) non-external -[Verve_AvidUIWebViewHolder setWebView:]
0000000000003990 (__TEXT,__text) non-external -[Verve_AvidUIWebViewHolder webView]
                 (undefined) external _OBJC_CLASS_$_UIWebView (from UIKit)
0000000000129068 (__DATA,__objc_data) external _OBJC_CLASS_$_VRVMoatUIWebViewBridge
0000000000128410 (__DATA,__objc_data) external _OBJC_CLASS_$_Verve_AvidUIWebViewHolder
0000000000126d18 (__DATA,__objc_ivar) non-external (was a private external) _OBJC_IVAR_$_VRVMoatUIWebViewBridge._webView
0000000000126988 (__DATA,__objc_ivar) non-external (was a private external) _OBJC_IVAR_$_Verve_AvidUIWebViewHolder._webView
0000000000129090 (__DATA,__objc_data) external _OBJC_METACLASS_$_VRVMoatUIWebViewBridge
00000000001283e8 (__DATA,__objc_data) external _OBJC_METACLASS_$_Verve_AvidUIWebViewHolder