Provide defaults for FluxVariablesCache and FluxVariablesCacheFiller

Closes #867

See merge request !3077

The former checks whether a property is specialized for the given typetag,
The latter are convenience alias to get the defined type if it's
specialized for the TypeTag and some other given type if not.

[version] Bump version to 3.6-git

See merge request !3076

Feature/headercheck

See merge request !3064

Update changelog

See merge request !3073

[material][pnm] Fix position of deprecated attribute

See merge request !3071

[readme] Update pipeline link to release 3.5

See merge request !3070

[ci] Try to improve stage names

See merge request !3068

Cleanup/cmakelists

See merge request !3066

[doc] add equations of geomechanics models in doxygen

Closes #1139

See merge request !3042

[cleanup] remove the discretization methods in model descriptions

Closes #1144

See merge request !3063

[example][biomineralization][material][co2] use new type of CO2 tables,...

See merge request !3062

Johannes Hommel authored 2 years ago and Timo Koch committed 2 years ago

[example][biomineralization][material][co2] adapt example doc to the use of a new type of CO2 tables, generated from NIST homepage

Johannes Hommel authored 2 years ago and Timo Koch committed 2 years ago

[example][biomineralization][material][co2] use new type of CO2 tables, generated from NIST homepage

Revert "Merge branch 'feature/test-python-increase-timeout' into 'master'"

See merge request !3059

This reverts merge request !3055

[doc][doxygen] Improve documentation

See merge request !3061