implement zilliqa bech32 address

[hewigovens]

Fixes #444

[codecov]

Codecov Report

Merging #445 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #445      +/-   ##
==========================================
+ Coverage   81.53%   81.56%   +0.03%     
==========================================
  Files         247      247              
  Lines        5725     5729       +4     
==========================================
+ Hits         4668     4673       +5     
+ Misses       1057     1056       -1

Impacted Files	Coverage Δ
src/interface/TWHRP.cpp	96.66% <100%> (+0.37%)	⬆️
src/interface/TWZilliqaAddress.cpp	84.61% <100%> (ø)
src/Zilliqa/Address.h	100% <100%> (ø)	⬆️
src/Zilliqa/AddressChecksum.cpp	100% <100%> (ø)	⬆️
src/Coin.cpp	78.04% <100%> (ø)	⬆️
src/Zilliqa/Signer.cpp	96.87% <100%> (ø)	⬆️
src/Cosmos/Address.cpp	89.47% <0%> (+5.26%)	⬆️
src/Cosmos/Address.h	75% <0%> (+8.33%)	⬆️

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