Fix failed command in ci

[Smolevich]

• PHP 7.1 was deleted from ci matrix (phpunit and cedx/coveralls require php>= 7.2)
• Using action for setup php

[codecov-commenter]

Codecov Report

Merging #2045 into master will decrease coverage by 0.24%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2045      +/-   ##
============================================
- Coverage     87.15%   86.90%   -0.25%     
  Complexity      672      672              
============================================
  Files            31       31              
  Lines          1541     1558      +17     
============================================
+ Hits           1343     1354      +11     
- Misses          198      204       +6     

Impacted Files	Coverage Δ	Complexity Δ
...rc/Jenssegers/Mongodb/Eloquent/HybridRelations.php	87.64% <0.00%> (-5.95%)	34.00% <0.00%> (ø%)
src/Jenssegers/Mongodb/Queue/MongoQueue.php	100.00% <0.00%> (ø)	10.00% <0.00%> (ø%)
src/Jenssegers/Mongodb/Relations/EmbedsMany.php	97.24% <0.00%> (+0.10%)	45.00% <0.00%> (ø%)
src/Jenssegers/Mongodb/Eloquent/Builder.php	87.93% <0.00%> (+0.21%)	22.00% <0.00%> (ø%)

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[divine]

Looks good

[Smolevich]

@jenssegers please refresh old cache for ci matrix

These steps was deleted

[divine]

@jenssegers ping 😢

[jenssegers]

@Smolevich will do!