Add default decoder for anonymous record types to BasicTypeRegistry #644

Job	Run time
Build	8s
Build	8s
Test (windows, head, 16.0-1-windows-x64, 16)	2m 39s
Test (windows, head, 16.0-1-windows-x64, 16)	2m 42s
Test (windows, 2.5, 9.4.26-1-windows-x64, 9.4)	6m 21s
Test (windows, 2.5, 9.4.26-1-windows-x64, 9.4)	6m 21s
Test (windows, mswin, 16.0-1-windows-x64, 16)	1m 33s
Test (windows, mswin, 16.0-1-windows-x64, 16)	2m 10s
Test (ubuntu, head, 16)	1m 2s
Test (ubuntu, head, 16)	1m 2s
Test (ubuntu, 3.2, 12)	1m 20s
Test (ubuntu, 3.2, 12)	1m 20s
Test (ubuntu, 20.04, 2.5, 9.3)	1m 27s
Test (ubuntu, 20.04, 2.5, 9.3)	1m 27s
Test (ubuntu, truffleruby, 13)	1m 48s
Test (ubuntu, truffleruby, 13)	1m 58s
Test (ubuntu, truffleruby-head, 16)	1m 54s
Test (ubuntu, truffleruby-head, 16)	1m 52s
Test (macos, head, 16.0-1-osx, 16)	1m 21s
Test (macos, head, 16.0-1-osx, 16)	6h 0m 17s
	6h 38m 50s

Provide feedback