如何升级uniapp版本，和查看uniapp版本

如何查看uniapp版本，和升级uniapp版本。

模拟器调试经常白屏，需要重启无数次才恢复。打算升级一下uniapp版本，不知道是否可以解决这个问题

10:55:48.590 reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->TypeError: undefined is not an object (evaluating 'o.jWeixin')  
10:55:48.610 getTemplateInfo== template md5 d4a0f054ec6ec9dad2f228c89e5b02ab length 3370986 base64 md5 1KDwVOxuydrS8ijInlsCqw== response header {"templateSourceBase64MD5":["1KDwVOxuydrS8ijInlsCqw=="],"templateSourceMD5":["d4a0f054ec6ec9dad2f228c89e5b02ab"]}  
10:55:48.631 reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->TypeError: undefined is not an object (evaluating 'o.jWeixin')  
10:55:48.651 getTemplateInfo== template md5 d4a0f054ec6ec9dad2f228c89e5b02ab length 3370986 base64 md5 1KDwVOxuydrS8ijInlsCqw== response header {"templateSourceBase64MD5":["1KDwVOxuydrS8ijInlsCqw=="],"templateSourceMD5":["d4a0f054ec6ec9dad2f228c89e5b02ab"]}  
10:55:48.672 reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->TypeError: undefined is not an object (evaluating 'o.jWeixin')  
10:55:48.692 getTemplateInfo== template md5 d4a0f054ec6ec9dad2f228c89e5b02ab length 3370986 base64 md5 1KDwVOxuydrS8ijInlsCqw== response header {"templateSourceBase64MD5":["1KDwVOxuydrS8ijInlsCqw=="],"templateSourceMD5":["d4a0f054ec6ec9dad2f228c89e5b02ab"]}  
10:55:55.756 reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->TypeError: undefined is not an object (evaluating 'o.jWeixin')  
10:55:55.776 getTemplateInfo== template md5 d4a0f054ec6ec9dad2f228c89e5b02ab length 3370986 base64 md5 1KDwVOxuydrS8ijInlsCqw== response header {"templateSourceBase64MD5":["1KDwVOxuydrS8ijInlsCqw=="],"templateSourceMD5":["d4a0f054ec6ec9dad2f228c89e5b02ab"]}