Replacing unmaintained extension GraphViz with Diagrams

[YOUR1]

The GraphViz extension is unmaintained and not working with MW versions newer then 1.32. Diagrams seems to do the same, and is working properly. We've tested it and came to the conclusion that Diagrams is a good replacement.

[codecov-commenter]

Codecov Report

Merging #745 (4166b60) into master (993be16) will decrease coverage by 0.02%. The diff coverage is 20.68%.

@@             Coverage Diff              @@
##             master     #745      +/-   ##
============================================
- Coverage     39.61%   39.59%   -0.03%     
- Complexity     2046     2054       +8     
============================================
  Files            75       75              
  Lines          7234     7251      +17     
============================================
+ Hits           2866     2871       +5     
- Misses         4368     4380      +12     

Impacted Files	Coverage Δ
formats/graphviz/SRF_Process.php	0.00% <0.00%> (ø)
src/Graph/GraphPrinter.php	0.00% <0.00%> (ø)
src/Graph/GraphFormatter.php	78.07% <42.85%> (-4.29%)	:arrow_down:

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[JeroenDeDauw]

This is a breaking change and thus requires bumping the SRF version to 5.x. This could be avoided by supporting both extensions. Not sure if that is feasible.

[YOUR1]

This is a breaking change and thus requires bumping the SRF version to 5.x. This could be avoided by supporting both extensions. Not sure if that is feasible.

I’ll see if I can come up with something 👌

[YOUR1]

Don't know why the tests are failing; whenever I run the test locally, it succeeds. I'll see what's up tomorrow.

[gesinn-it-gea]

To my opinion, it would be okay to release SRF 5.x and end the tradition, that SRF always has the same major verison as SMW.

[JeroenDeDauw]

Totally agree, we have stopped following that tradition a while ago and are only coincidentally on the same major version now.