Fix bugs in BCF I/O

[alumi]

Summary

This PR fixes miscellaneous bugs in BCF reader/writer

1. Header string is missing a \newline at its end
2. Duplicated idxs of FILTER/INFO/FORMAT are not allowed
3. Some integer values are reserved: 0x80–0x87, 0x8000–0x8007, 0x80000000–0x80000007
4. Incorrect values are written for MISSING float 0x7F800001
5. Encoding/decoding is broken for some types and values
6. END info is not referred to when encoding reference length

Tests

• lein check 🆗
• lein test :all 🆗
• lein cloverage 🆗
• lein eastwood 🆗

[codecov]

Codecov Report

Merging #168 into master will increase coverage by 0.33%.
The diff coverage is 93.02%.

@@            Coverage Diff             @@
##           master     #168      +/-   ##
==========================================
+ Coverage   86.53%   86.87%   +0.33%     
==========================================
  Files          73       73              
  Lines        5624     5663      +39     
  Branches      491      481      -10     
==========================================
+ Hits         4867     4920      +53     
+ Misses        266      262       -4     
+ Partials      491      481      -10

Impacted Files	Coverage Δ
src/cljam/io/vcf/util.clj	95.31% <100%> (+2.45%)	⬆️
src/cljam/io/bcf/reader.clj	96% <100%> (+3.47%)	⬆️
src/cljam/io/bcf/writer.clj	89.85% <90.83%> (+3.14%)	⬆️

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[athos]

Thanks for fixing those issues! Just added a couple of minor comments.

[yito88]

LGTM 👍

[alumi]

@athos Thank you for the comments! I've fixed them in c8172d7...5f030a7

[athos]

LGTM 👍I'll merge it.

[alumi]

Thank you for reviewing! @athos @yito88 😃