cli: implement channel deposit, close, settle and fix some issues with channels interface

[andrevmatos]

Part of #1692

Short description
Extend the channel part of the CLI:

• balance field contains what is called capacity on the SDK, i.e. the amount which can still be transferred on the channel
• state contains a different set of strings: opened, closed, settled, so we need to adapt our more descriptive state to these
• all numbes are serialized as strings, including small ones like id, settleTimeout and revealTimeout
• implement PATCH method on the channels endpoint:
  • body with { "state": "closed"|"settled" } respectively closes and settles the channel
  • body with { "total_deposit": "<number>" } deposits amout which takes the total deposit to the requested amount
  • body with { "total_withdral": "<number>" } withdraws amount which brings total withdraw to the requested amount

Definition of Done

• Steps to manually test the change have been documented
• Acceptance criteria are met
• Change has been manually tested by the reviewer (dApp)

Steps to manually test the change (dApp)

1. Test calling actions on a channel with the respective PATCH on the API

[github-actions]

You modified raiden-ts/src,
Please remember to add a change log entry at raiden-ts/CHANGELOG.md if necessary.

[codecov]

Codecov Report

Merging #1903 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1903   +/-   ##
=======================================
  Coverage   95.66%   95.66%           
=======================================
  Files         155      155           
  Lines        5791     5791           
  Branches     1090     1089    -1     
=======================================
  Hits         5540     5540           
  Misses        193      193           
  Partials       58       58           

Flag	Coverage Δ
#dapp	91.76% <ø> (ø)
#sdk	97.28% <100.00%> (ø)
#sdk_e2e	65.57% <100.00%> (+0.02%)	⬆️
#sdk_unit	86.47% <0.00%> (ø)

Impacted Files	Coverage Δ
raiden-ts/src/raiden.ts	91.42% <100.00%> (ø)

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[weilbith]

Thanks for implementing this feature. I was kinda afraid to do so back then. Happy that is comes now.

[weilbith]

Thanks that you did all the adjustments according to my review requests. I highly appreciate that!! 🙏