Updates version number to 0.4.363251579.20210316.
Updates version number to 0.4.363251579.20210316.

PiperOrigin-RevId: 363255092
(cherry picked from commit 1d33eefd2d4716698f6fb0476cec298c2e11aee0)

bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi