Update web3 and eth-utils to fix issue 488

[jasonrhaas]

Fixes #488

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@0e950bc). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master     #489   +/-   ##
=========================================
  Coverage          ?   28.99%           
=========================================
  Files             ?       89           
  Lines             ?     4484           
  Branches          ?      542           
=========================================
  Hits              ?     1300           
  Misses            ?     3138           
  Partials          ?       46

Impacted Files	Coverage Δ
app/dashboard/views.py	19.19% <100%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0e950bc...6ffe3da. Read the comment docs.

[owocki]

thanks @jasonrhaas !