Modified gff3_sort.py and version

[ShangYuChiang]

No description provided.

[codecov]

Codecov Report

Merging #111 (d71555b) into master (dcfcbe3) will not change coverage.
The diff coverage is 50.00%.

@@          Coverage Diff           @@
##           master    #111   +/-   ##
======================================
  Coverage    6.86%   6.86%           
======================================
  Files          27      27           
  Lines        5014    5014           
======================================
  Hits          344     344           
  Misses       4670    4670           

Impacted Files	Coverage Δ
gff3tool/bin/gff3_sort.py	4.30% <0.00%> (ø)
gff3tool/bin/version.py	100.00% <100.00%> (ø)

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[mpoelchau]

Thanks @ShangYuChiang ! This should fix #110.