Swift5

[koraykoska]

General Swift5 compatibility / error and warnings fix.

[koraykoska]

The only real "breaking" change is the removed bytes label from the BytesInitializable interface. This is in order to match Swift stdlib APIs and be compatible with Data and other core classes.

[codecov[bot]]

Codecov Report

Merging #78 into master will decrease coverage by 0.66%. The diff coverage is 54.34%.

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
- Coverage   75.14%   74.48%   -0.67%     
==========================================
  Files          64       63       -1     
  Lines        4152     4205      +53     
==========================================
+ Hits         3120     3132      +12     
- Misses       1032     1073      +41

Impacted Files	Coverage Δ
...s/Core/Json/EthereumTransactionReceiptObject.swift	0% <0%> (ø)	:arrow_up:
...3/Classes/ContractABI/Contract/SolidityEvent.swift	64.44% <0%> (ø)	:arrow_up:
Web3/Classes/ContractABI/ABI/Eth+ABI.swift	0% <0%> (ø)	:arrow_up:
Web3/Classes/Core/Json/EthereumLogObject.swift	0% <0%> (ø)	:arrow_up:
Web3/Classes/Core/Toolbox/BytesConvertible.swift	0% <0%> (ø)	:arrow_up:
...Classes/Core/Toolbox/String+BytesConvertible.swift	78.57% <0%> (ø)	:arrow_up:
.../Classes/Core/Json/EthereumTransactionObject.swift	50% <0%> (-22.23%)	:arrow_down:
Web3/Classes/ContractABI/Contract/ERC165.swift	0% <0%> (ø)	:arrow_up:
Web3/Classes/ContractABI/Contract/ERC20.swift	0% <0%> (ø)	:arrow_up:
...lasses/Core/Toolbox/BigUInt+BytesConvertible.swift	100% <100%> (ø)	:arrow_up:
... and 28 more

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