Fix the \Cycle\Database\Query\Traits\JoinTrait::on() method run

[roxblnfk]

spiral-modules/database#69

[codecov]

Codecov Report

Merging #6 (62ec0a3) into master (08c7529) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master       #6      +/-   ##
============================================
- Coverage     92.52%   92.50%   -0.03%     
- Complexity     1489     1490       +1     
============================================
  Files            67       67              
  Lines          3841     3841              
============================================
- Hits           3554     3553       -1     
- Misses          287      288       +1     

Impacted Files	Coverage Δ
src/Query/Traits/HavingTrait.php	92.30% <ø> (ø)
src/Query/Traits/WhereTrait.php	100.00% <ø> (ø)
src/Query/Traits/JoinTrait.php	89.87% <100.00%> (ø)
src/Query/Traits/TokenTrait.php	89.90% <100.00%> (-0.92%)	⬇️

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