FLUT-927696-[others]: updated release file

Author: Mugunthan-Ramalingam

packages/syncfusion_flutter_chat/screenshots/flutter_appointment_selection_chat.gif

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+# See https://dart.dev/tools/pub/publishing#what-files-are-published
+
+lib/src/test/*
+

packages/syncfusion_flutter_chat/screenshots/flutter_customized_chat.gif

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+Syncfusion License
+
+Syncfusion Flutter PDF package is available under the Syncfusion Essential Studio program, and can be licensed either under the Syncfusion Community License Program or the Syncfusion commercial license.
+
+To be qualified for the Syncfusion Community License Program you must have a gross revenue of less than one (1) million U.S. dollars ($1,000,000.00 USD) per year and have less than five (5) developers in your organization, and agree to be bound by Syncfusion’s terms and conditions. 
+ 
+Customers who do not qualify for the community license can contact [email protected] for commercial licensing options.
+
+Under no circumstances can you use this product without (1) either a Community License or a commercial license and (2) without agreeing and abiding by Syncfusion’s license containing all terms and conditions. 
+ 
+The Syncfusion license that contains the terms and conditions can be found at 
+https://www.syncfusion.com/content/downloads/syncfusion_license.pdf
+
+Syncfusion provides implementation but you would subsequently need to have a license to use Flutter. The Flutter engine must be licensed from google directly. We do not license Flutter or the Flutter Engine and provide no license or rights even if you end up with the binaries from us by mistake.