Update to Substrate 2.0.0-RC6

[mikiquantum]

Updates:

• Go Version to 1.14.x
• Events
• TransactionVersion in Signature
• Weight to u64
• Use of Substrate RC6 image
• Latest subkey 2.0.0

[codecov]

Codecov Report

Merging #97 into master will decrease coverage by 2.72%.
The diff coverage is 75.34%.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
- Coverage   60.36%   57.63%   -2.73%     
==========================================
  Files          90       92       +2     
  Lines        3658     3118     -540     
==========================================
- Hits         2208     1797     -411     
+ Misses       1094      964     -130     
- Partials      356      357       +1     

Impacted Files	Coverage Δ
types/event_record.go	57.54% <ø> (-1.08%)	⬇️
types/runtime_version.go	32.25% <ø> (-2.53%)	⬇️
types/weight.go	100.00% <ø> (ø)
types/extrinsic_payload.go	22.03% <41.93%> (-26.36%)	⬇️
signature/signature.go	60.93% <100.00%> (-0.83%)	⬇️
types/balance_status.go	100.00% <100.00%> (ø)
types/election_compute.go	100.00% <100.00%> (ø)
types/events.go	85.10% <100.00%> (+3.28%)	⬆️
types/extrinsic.go	48.12% <100.00%> (-2.92%)	⬇️
... and 90 more

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[mikiquantum]

Version v2.0.0-rc6 for subkey is broken, so opted to use 2.0.0 instead.

[vedhavyas]

Nice work! Thanks!
LGTM

[lucasvo]

I think this fixes the public key issue in #83 and #80 correct? Could you close them @mikiquantum ?

[mikiquantum]

@lucasvo nope, #80 is not addressed yet, because I believe we should tackle #83 instead., which will implicitly #80 as the response would be a structured json, easily indexable instead of parsing a text output.