fix(deps): update dependency bn.js to v5 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bn.js	dependencies	major	^4.11.8 -> ^5.0.0

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Release Notes

indutny/bn.js

v5.0.0

Compare Source

• travis: update node versions (#​205)
• Refactor buffer constructor (#​200)
• lib: fix for negative numbers: imuln, modrn, idivn (#​185)
• bn: fix Red#imod (#​178)
• check unexpected high bits for invalid characters (#​173)
• document support very large integers (#​158)
• only define toBuffer if Buffer is defined (#​172)
• lib: better validation of string input (#​151)
• tests: reject decimal input in constructor (#​91)
• bn: make .strip() an internal method (#​105)
• lib: deprecate .modn() introduce .modrn() (#​112 #​129 #​130)
• bn: don't accept invalid characters (#​141)
• package: use files insteadof .npmignore (#​152)
• bn: improve allocation speed for buffers (#​167)
• toJSON to default to interoperable hex (length % 2) (#​164)

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[danwbyrne]

Looks like bn.js is not letting scientific notation through anymore, it actually looks like it never did? indutny/bn.js#209

Should we open an issue and skip this test temporarily? @dicarlo2