Remove deprecation warning from mapper.update()

Closes #1051

See merge request !2711

Only throw deprecation warning with dune-grid >= 2.8 when the
new interface was introduced in dune which provides the most
commonly used mapper class MCMGMapper.

[fvassembler] Set r=0 in the beginning of assembleResidual

See merge request !2705

[bin][installDumux] Add missing cd for commands which ask user to copy & run

See merge request !2699

Merge branch 'mention-dependencies' into 'releases/3.4'

See merge request !2703

mention version requirements for Dune, CMake and OPM in the CHANGELOG

See merge request !2702

(cherry picked from commit ac95cf09)

eaeabc14 mention version requirements for Dune, CMake and OPM in the CHANGELOG

Merge branch 'fix/cornerpoint-test' into 'releases/3.4'

See merge request !2701

Fix 2p cornerpoint test by including required headers

See merge request !2700

(cherry picked from commit 1af223c9)

eccfde38 [test] fix 2p cornerpoint test by including required headers

[pnm] Export element type in FVElemenetGeometry implementation

See merge request !2694

Feature/mpfa boundary flag

See merge request !2695

Tabulated2DFunction::get(): out-of-bounds fix, also preferring interpolation to extrapolation

See merge request !2692

Improve time information in TimeLoop

Closes #1045

See merge request !2688

Feature/separate vtk field type

See merge request !2686

[fvproblem] Fix typo

See merge request !2684

Resolve "Run and fix make headercheck (3.4)" (dumux-repo)

Closes #1040

See merge request !2675

Resolve "Unify guards for uggrid"

Closes #1043

See merge request !2676

[test][math] Lower precision for polynomial test

See merge request !2671

Timo Koch authored 3 years ago and Dennis Gläser committed 3 years ago

When the roots are very close together the inversion becomes ill-conditioned.
Exclude these cases from the random generation, test some corner cases
with close roots and decrease the tolerance for root comparison.

[doc] Add comment in release issue template

See merge request !2672

[ci] test release branches

See merge request !2669