[vividus] Enable dotall mode for step asserting against regex

[valfirst]

Fixes #1967

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication

[codecov]

Codecov Report

Merging #1970 (cb23989) into master (ec6b7e3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master    #1970   +/-   ##
=========================================
  Coverage     96.01%   96.01%           
  Complexity     5298     5298           
=========================================
  Files           751      751           
  Lines         15116    15117    +1     
  Branches       1030     1030           
=========================================
+ Hits          14514    14515    +1     
  Misses          469      469           
  Partials        133      133           

Impacted Files	Coverage Δ
...n/java/org/vividus/bdd/steps/BddVariableSteps.java	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ec6b7e3...cb23989. Read the comment docs.