Bump version to v2.49.3 #256

Job	Run time
Tests	1m 55s
Android Build	6m 12s
Cross compile Linux aarch64 (using prebuilt WebRTC)	1m 58s
RingRTC as dependency (using Prebuilt WebRTC) (ubuntu-22.04)	1m 18s
Code Formatting	38s
RingRTC as dependency (using Prebuilt WebRTC) (macos-13)	3m 43s
RingRTC as dependency (using Prebuilt WebRTC) (windows-latest)	3m 22s
iOS Tests	6m 43s
Electron Tests (ubuntu-22.04)	3m 15s
Lints	8m 48s
Electron Tests (windows-latest)	4m 33s
Electron Tests (macos-13)	6m 34s
	48m 59s

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