Support istanbul on devchain

[0xGabi]

🦅 Pull Request

Add support for hardfork option to devchain.

We use istanbul as default. Other options are: byzantium, constantinople and petersburg.

🚨 Test instructions

Compare gas cost of deploying a token between petersburg and istanbul.

[codecov]

Codecov Report

Merging #1180 into develop will decrease coverage by 0.02%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##           develop    #1180      +/-   ##
===========================================
- Coverage     26.9%   26.88%   -0.03%     
===========================================
  Files          122      121       -1     
  Lines         2293     2291       -2     
===========================================
- Hits           617      616       -1     
+ Misses        1676     1675       -1

Impacted Files	Coverage Δ
packages/cli/src/commands/devchain_cmds/start.js	0% <ø> (ø)	⬆️
packages/cli/src/commands/run.js	0% <0%> (ø)	⬆️
packages/toolkit/src/ipfs/misc.js	34.14% <0%> (-2.44%)	⬇️
packages/toolkit/src/ipfs/daemon.js	86.66% <0%> (ø)	⬆️

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[macor161]

LGTM! Nice work 💯