Expand v0.9 changelog

[codecov[bot]]

Codecov Report

Merging #310 (403ea58) into master (b6790fa) will decrease coverage by 0.96%. The diff coverage is n/a.

:exclamation: Current head 403ea58 differs from pull request most recent head 412202d. Consider uploading reports for the commit 412202d to get more accurate results

@@            Coverage Diff             @@
##           master     #310      +/-   ##
==========================================
- Coverage   82.38%   81.42%   -0.97%     
==========================================
  Files          17       17              
  Lines        1198     1179      -19     
==========================================
- Hits          987      960      -27     
- Misses        211      219       +8     

Impacted Files	Coverage Δ
src/ffmpeg/SWScale/src/SWScale.jl	0.00% <0.00%> (-100.00%)	:arrow_down:
src/ffmpeg/AVDevice/src/AVDevice.jl	0.00% <0.00%> (-100.00%)	:arrow_down:
src/ffmpeg/AVFormat/src/AVFormat.jl	0.00% <0.00%> (-100.00%)	:arrow_down:
src/ffmpeg/AVUtil/src/AVUtil.jl	0.00% <0.00%> (-66.67%)	:arrow_down:
src/ffmpeg/AVCodecs/src/AVCodecs.jl	0.00% <0.00%> (-66.67%)	:arrow_down:
src/avdictionary.jl	9.37% <0.00%> (-11.84%)	:arrow_down:
src/testvideos.jl	76.92% <0.00%> (-3.08%)	:arrow_down:
src/avptr.jl	66.66% <0.00%> (-2.81%)	:arrow_down:
src/VideoIO.jl	52.27% <0.00%> (-1.07%)	:arrow_down:

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[IanButterworth]

Great to have this all detailed. Thanks!

Do we also want to add a warning and suggestions regarding what to do about https://github.com/JuliaIO/VideoIO.jl/issues/308

[galenlynch]

Done. Wording is not the cleanest or most consistent with hyphenations etc so feel free to edit as you see fit.