Pypsa

What's Changed
* ci: update all action versions by FabianHofmann in https://github.com/PyPSA/linopy/pull/225
* make it possible to suppress solver output when running CBC and GLPK by maurerle in https://github.com/PyPSA/linopy/pull/224
* QP support for MOSEK, COPT, MindOpt by fneum in https://github.com/PyPSA/linopy/pull/223
* setup.py: use env markers for solvers by FabianHofmann in https://github.com/PyPSA/linopy/pull/227

New Contributors
* maurerle made their first contribution in https://github.com/PyPSA/linopy/pull/224

**Full Changelog**: https://github.com/PyPSA/linopy/compare/v0.3.3...v0.3.4

What's Changed
* Allow removing objective expression from the model by Irieo in https://github.com/PyPSA/linopy/pull/212
* allow removing multiple constraints at once by Irieo in https://github.com/PyPSA/linopy/pull/211
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/213
* Fix benchmark_jump.jl by odow in https://github.com/PyPSA/linopy/pull/215
* require higher xarray version by lindnemi in https://github.com/PyPSA/linopy/pull/218
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/214
* address deprecations and issue with multiindex deserialization by FabianHofmann in https://github.com/PyPSA/linopy/pull/220
* Add SCIP solver interface by FabianHofmann in https://github.com/PyPSA/linopy/pull/78

New Contributors
* Irieo made their first contribution in https://github.com/PyPSA/linopy/pull/212
* lindnemi made their first contribution in https://github.com/PyPSA/linopy/pull/218

**Full Changelog**: https://github.com/PyPSA/linopy/compare/v0.3.2...v0.3.3

What's Changed
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/196
* Update README.md by d3netxer in https://github.com/PyPSA/linopy/pull/195
* MOSEK ensure any license tokens are checked in after initialisation by jotaigna in https://github.com/PyPSA/linopy/pull/199
* set fill value to 0.0 to prevent cohersion to int for matrices.c by dannyopts in https://github.com/PyPSA/linopy/pull/201
* IO: multiindeces and general fixes by FabianHofmann in https://github.com/PyPSA/linopy/pull/202
* Safe remove helper dims from coords by FabianHofmann in https://github.com/PyPSA/linopy/pull/205
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/204
* Use os.makedirs to create parent dirs for solution_fn by dannyopts in https://github.com/PyPSA/linopy/pull/203

New Contributors
* d3netxer made their first contribution in https://github.com/PyPSA/linopy/pull/195
* jotaigna made their first contribution in https://github.com/PyPSA/linopy/pull/199

**Full Changelog**: https://github.com/PyPSA/linopy/compare/v0.3.1...v0.3.2

What's Changed
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/191
* add COPT solver by fneum in https://github.com/PyPSA/linopy/pull/190
* Retrieve solution before closing the gurobi env by dannyopts in https://github.com/PyPSA/linopy/pull/193
* add MindOpt solver by fneum in https://github.com/PyPSA/linopy/pull/188
* add MOSEK solver by fneum in https://github.com/PyPSA/linopy/pull/189
* constant: ensure float value & improve printing of constants by FabianHofmann in https://github.com/PyPSA/linopy/pull/194


**Full Changelog**: https://github.com/PyPSA/linopy/compare/v0.3...v0.3.1

What's Changed
* add option to pass existing gurobipy.Env to run_gurobipy() by fneum in https://github.com/PyPSA/linopy/pull/172
* Remove logging.disable from gurobi solve by dannyopts in https://github.com/PyPSA/linopy/pull/174
* Sourcery refactored master branch by sourcery-ai in https://github.com/PyPSA/linopy/pull/175
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/173
* Fix typo in double logging by dannyopts in https://github.com/PyPSA/linopy/pull/177
* solvers: update cplex condition map by FabianHofmann in https://github.com/PyPSA/linopy/pull/178
* [pre-commit.ci] pre-commit autoupdate by pre-commit-ci in https://github.com/PyPSA/linopy/pull/179
* add objective module and objective class in order to allow maximization problems by FabianHofmann in https://github.com/PyPSA/linopy/pull/170
* refine treatment of missing values by FabianHofmann in https://github.com/PyPSA/linopy/pull/180
* Remove deprecations for v0.3 by FabianHofmann in https://github.com/PyPSA/linopy/pull/181
* add transport tutorial to index.rst by FabianHofmann in https://github.com/PyPSA/linopy/pull/183
* explicitly use `from_pandas_multiindex` in groupby function by FabianHofmann in https://github.com/PyPSA/linopy/pull/182

New Contributors
* fneum made their first contribution in https://github.com/PyPSA/linopy/pull/172
* dannyopts made their first contribution in https://github.com/PyPSA/linopy/pull/174
* sourcery-ai made their first contribution in https://github.com/PyPSA/linopy/pull/175

**Full Changelog**: https://github.com/PyPSA/linopy/compare/v0.2.6...v0.3

Full release notes can be found here:
https://pypsa-eur.readthedocs.io/en/latest/release_notes.html#pypsa-eur-0-3-0-7th-december-2020