2 warnings generated by cycle importing

[Schoonmoeder]

Hello,
we get 2 warnings because of (in)direct including in the library.
please fix them by direct import/require the parts from where they come from and not through a secondary file.

Require cycle: node_modules/boost-zil/lib/signable/bystr.js -> node_modules/boost-zil/lib/utill.js -> node_modules/boost-zil/lib/signable/bystr.js

Require cycle: node_modules/boost-zil/lib/signable/index.js -> node_modules/boost-zil/lib/signable/bystr.js -> node_modules/boost-zil/lib/utill.js -> node_modules/boost-zil/lib/signable/index.js

using var util_1 = require("@zilliqa-js/util"); inside the bystr.js file

don't directly know if this fixes both warnings.

thanks in advanced!