Remove unbound version constraints from composer.json

[akondas]

No description provided.

[codecov]

Codecov Report

Merging #508 (222e18a) into master (b7d6a42) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #508   +/-   ##
=========================================
  Coverage     99.32%   99.32%           
  Complexity     1884     1884           
=========================================
  Files           300      300           
  Lines          5970     5970           
=========================================
  Hits           5930     5930           
  Misses           40       40           

---

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 b7d6a42...222e18a. Read the comment docs.