v1.13.0-rc.4

Changes since v1.13.0-rc.3

• fix(export): wait for GIF cancel to finish native cleanup
• fix(export): surface GIF cancel request failures
• fix(capture-linux): latch capture-started so an early first frame is not lost
• fix(capture-linux): keep the liveness check ahead of the capture latch
• test(capture-linux): cover the undeferred, repeated and post-error capture waits
• test(capture-linux): state what each wait case pins

Full Changelog: v1.13.0-rc.3...v1.13.0-rc.4