Adding OSGi Bundle MANIFEST headers

[balazs-zsoldos]

Possibility of using the library as an OSGi bundle.

If you could, please, release a version with the
OSGi Bundle MANIFEST headers to maven central,
I would be very thankful.

A bugfix version incrementation would be enough as
no new feature or incompatible change is introduced.

[codecov-io]

Codecov Report

Merging #2 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master     #2    +/-   ##
========================================
  Coverage       100%   100%            
- Complexity        0    276   +276     
========================================
  Files             6      6            
  Lines           508    508            
  Branches        158    129    -29     
========================================
  Hits            508    508

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