Truncate data to specified size when ABI encoding

[alejandro-isaza]

No description provided.

[codecov-io]

Codecov Report

Merging #24 into master will increase coverage by 0.1%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master     #24     +/-   ##
========================================
+ Coverage   84.59%   84.7%   +0.1%     
========================================
  Files          47      47             
  Lines        1792    1804     +12     
========================================
+ Hits         1516    1528     +12     
  Misses        276     276

Impacted Files	Coverage Δ
Sources/Ethereum/Solidity/ABIValue.swift	72.22% <100%> (+0.67%)	⬆️
Tests/Ethereum/Solidity/ABIEncoderTests.swift	98.71% <100%> (+0.14%)	⬆️
Sources/Ethereum/Solidity/ABIEncoder.swift	89.81% <100%> (+0.09%)	⬆️

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