fix: some MSE error

[xiaoyuhen]

fix: some MSE error

Description

• fix: mediaSource.endOfStream() Throws error
• fix: SourceBuffer has been removed

[codecov-io]

Codecov Report

Merging #26 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master      #26   +/-   ##
=======================================
  Coverage   53.32%   53.32%           
=======================================
  Files         123      123           
  Lines        1652     1652           
=======================================
  Hits          881      881           
  Misses        771      771

Impacted Files	Coverage Δ
packages/griffith-mp4/src/player.js	0% <0%> (ø)	⬆️
packages/griffith-mp4/src/mse/controller.js	0% <0%> (ø)	⬆️

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[liuwuhaoo]

LGTM