Release 2

[weilbith]

Prepare the next release.

GitHub release notes draft (looks different there...):

• Update contracts to 0.50.0 (https://github.com/raiden-network/raiden-services/pull/1195)
• Adapt to use timestamps instead of block numbers (https://github.com/raiden-network/raiden-services/pull/1144)
• Reschedule too early transactions (https://github.com/raiden-network/raiden-services/pull/1152)
• Automatically adapt number of confirmation blocks (https://github.com/raiden-network/raiden-services/pull/1156)
• Optimize transaction retry algorithm (https://github.com/raiden-network/raiden-services/pull/1158)
• Add new gas price strategy rpc (https://github.com/raiden-network/raiden-services/pull/1165)
• Fix the usage of POSIX UTC timestamps (https://github.com/raiden-network/raiden-services/pull/1172)

[codecov[bot]]

Codecov Report

Merging #1196 (75a9f43) into master (123ca2a) will decrease coverage by 0.02%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1196      +/-   ##
==========================================
- Coverage   89.22%   89.19%   -0.03%     
==========================================
  Files          44       44              
  Lines        3498     3498              
  Branches      497      497              
==========================================
- Hits         3121     3120       -1     
- Misses        271      272       +1     
  Partials      106      106              

Impacted Files	Coverage Δ
src/raiden_libs/blockchain.py	84.34% <0.00%> (-0.87%)	:arrow_down:

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