fix(core): run shouldn't freeze when unexpected exception is received

[Malinskiy]

async execution hangs the current context, need to use supervisor for properly running children

[codecov]

Codecov Report

Merging #788 (04ad70b) into develop (fdd84c2) will not change coverage.
The diff coverage is 0.00%.

❗ Current head 04ad70b differs from pull request most recent head 7a4946d. Consider uploading reports for the commit 7a4946d to get more accurate results

@@            Coverage Diff             @@
##             develop     #788   +/-   ##
==========================================
  Coverage      59.60%   59.60%           
  Complexity       821      821           
==========================================
  Files            208      208           
  Lines           4288     4288           
  Branches         699      699           
==========================================
  Hits            2556     2556           
  Misses          1406     1406           
  Partials         326      326           

Impacted Files	Coverage Δ
...src/main/kotlin/com/malinskiy/marathon/Marathon.kt	64.91% <0.00%> (ø)

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