default byte for fIOFeatures

[aminnj]

Closes #116

The TBranchElement_10 struct expects fIOfeatures but TBranch_12 doesn't read that field (only TBranch_13 has it):

root [11] TBranch::Class()->GetStreamerInfo(12)->ls()
root [12] TBranch::Class()->GetStreamerInfo(13)->ls()

[codecov]

Codecov Report

Merging #117 (92f945a) into master (db89380) will increase coverage by 2.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #117      +/-   ##
==========================================
+ Coverage   90.40%   92.55%   +2.15%     
==========================================
  Files          11       11              
  Lines        1355     1357       +2     
==========================================
+ Hits         1225     1256      +31     
+ Misses        130      101      -29     

Impacted Files	Coverage Δ
src/bootstrap.jl	92.30% <ø> (+8.24%)	⬆️
src/io.jl	89.39% <0.00%> (-1.52%)	⬇️
src/utils.jl	100.00% <0.00%> (ø)
src/types.jl	92.20% <0.00%> (+0.10%)	⬆️

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[aminnj]

Coverage 😊