ci: run workflow on push to master

[enthusiastmartin]

run GH worfklow on push to master ( useful for test coverage report).

[codecov]

Codecov Report

Merging #84 (6566944) into master (5229033) will increase coverage by 12.68%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #84       +/-   ##
===========================================
+ Coverage   72.21%   84.89%   +12.68%     
===========================================
  Files          22       17        -5     
  Lines        2102     1788      -314     
===========================================
  Hits         1518     1518               
+ Misses        584      270      -314     

Impacted Files	Coverage Δ
pallets/xyk/src/weights.rs
pallets/exchange/src/weights.rs
pallets/lbp/src/weights.rs
pallets/transaction-multi-payment/src/weights.rs
pallets/nft/src/weights.rs

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