Fix boundary of exon/intron determining process

[nokara26]

I fixed boundary of exon/intron determining process.

I executed lein test and lein test :slow and I confirmed all tests are passed.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (493bb81) 45.66% compared to head (c830345) 45.64%.

Files	Patch %	Lines
src/varity/vcf_to_hgvs/protein.clj	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #82      +/-   ##
==========================================
- Coverage   45.66%   45.64%   -0.03%     
==========================================
  Files          16       16              
  Lines        2006     2007       +1     
  Branches       65       66       +1     
==========================================
  Hits          916      916              
  Misses       1025     1025              
- Partials       65       66       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.