Handle uncompressed public keys, add tests

[alejandro-isaza]

No description provided.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@b89d685). Click here to learn what that means.
The diff coverage is 95.45%.

@@            Coverage Diff            @@
##             master      #33   +/-   ##
=========================================
  Coverage          ?   84.88%           
=========================================
  Files             ?       47           
  Lines             ?     1813           
  Branches          ?        0           
=========================================
  Hits              ?     1539           
  Misses            ?      274           
  Partials          ?        0

Impacted Files	Coverage Δ
Sources/Bitcoin/BitcoinAddress.swift	76.66% <100%> (ø)
Tests/Bitcoin/BitcoinAddressTests.swift	100% <100%> (ø)
Sources/Bitcoin/BitcoinPublicKey.swift	80.95% <88.88%> (ø)

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