simpeg/simpeg: v0.19.0

• Fix (and test) the pgi tutorials. by @jcapriot in https://github.com/simpeg/simpeg/pull/1133
• Run style checks in Azure Pipelines by @santisoler in https://github.com/simpeg/simpeg/pull/1134
• Add property to control number of processes created. by @jcapriot in https://github.com/simpeg/simpeg/pull/1135
• Use r-strings on strings and docstrings that contain backslashes by @santisoler in https://github.com/simpeg/simpeg/pull/1136
• Run flake8 in CI against a selection of rules by @santisoler in https://github.com/simpeg/simpeg/pull/1141
• Rename variables to avoid shadowing builtins by @santisoler in https://github.com/simpeg/simpeg/pull/1137
• Ignore flake warning over empty docstrings by @santisoler in https://github.com/simpeg/simpeg/pull/1149
• Avoid using getattr with fixed constant strings by @santisoler in https://github.com/simpeg/simpeg/pull/1139
• Separate flake 8 ignores by line breaks by @jcapriot in https://github.com/simpeg/simpeg/pull/1150
• Avoid using mutables as default parameters by @santisoler in https://github.com/simpeg/simpeg/pull/1142
• Ignore b028 by @jcapriot in https://github.com/simpeg/simpeg/pull/1155
• Remove unused imports across SimPEG by @santisoler in https://github.com/simpeg/simpeg/pull/1132
• Avoid calling functions in default arguments by @santisoler in https://github.com/simpeg/simpeg/pull/1143
• Fix plot_inv_mag_MVI_Sparse_TreeMesh.py by @thibaut-kobold in https://github.com/simpeg/simpeg/pull/1159
• fix mref depreciation in regularization/pgi.py by @thibaut-kobold in https://github.com/simpeg/simpeg/pull/1157
• Avoid using variables not binded in function definition by @santisoler in https://github.com/simpeg/simpeg/pull/1145
• Remove unused loop variables by @santisoler in https://github.com/simpeg/simpeg/pull/1138
• Enable use of inactive cells in equivalent source models by @nwilliams-kobold in https://github.com/simpeg/simpeg/pull/1147
• Flexible dc boundary by @jcapriot in https://github.com/simpeg/simpeg/pull/1168
• Do not use multiprocessing on single thread. by @jcapriot in https://github.com/simpeg/simpeg/pull/1170
• fix gmm.plot_pdf new error from sklearn >=1.2 by @thibaut-kobold in https://github.com/simpeg/simpeg/pull/1156
• Black 23.1 by @jcapriot in https://github.com/simpeg/simpeg/pull/1174
• Fix for _has_fields by @jcapriot in https://github.com/simpeg/simpeg/pull/1175
• Do not import deprecated discretize utilities by @jcapriot in https://github.com/simpeg/simpeg/pull/1176
• update codecov script by @jcapriot in https://github.com/simpeg/simpeg/pull/1178
• Linear mapping by @jcapriot in https://github.com/simpeg/simpeg/pull/1177
• Use discretize.utils.active_from_xyz to get active topography cells by @dccowan in https://github.com/simpeg/simpeg/pull/1171
• Update minimum versions by @jcapriot in https://github.com/simpeg/simpeg/pull/1179
• Add B028 to flake8 ignore by @jcapriot in https://github.com/simpeg/simpeg/pull/1181
• Add possibility to pass fields to getJtJdiag by @jcapriot in https://github.com/simpeg/simpeg/pull/1182
• Mira review beta estimator by @dccowan in https://github.com/simpeg/simpeg/pull/1173
• Add option for amplitude threshold on UpdateSens directive by @domfournier in https://github.com/simpeg/simpeg/pull/1163
• Change default n_processes for potential fields by @jcapriot in https://github.com/simpeg/simpeg/pull/1186
• Update current_utils.py by @domfournier in https://github.com/simpeg/simpeg/pull/1166
• Avoid comparing bool variables to True or False by @santisoler in https://github.com/simpeg/simpeg/pull/1160
• Avoid using bare excepts that catch every possible exception by @santisoler in https://github.com/simpeg/simpeg/pull/1140
• Update SimPEG.Report() by @prisae in https://github.com/simpeg/simpeg/pull/1104
• Addition regarding inversion to big_picture by @prisae in https://github.com/simpeg/simpeg/pull/729
• Do not store real lambdas as complex by @jcapriot in https://github.com/simpeg/simpeg/pull/1190
• Improve docstring of depth_weighting by @santisoler in https://github.com/simpeg/simpeg/pull/1192
• Add issue forms for github by @jcapriot in https://github.com/simpeg/simpeg/pull/1189
• Update deprecation usage in optimization module by @jcapriot in https://github.com/simpeg/simpeg/pull/1194
• Update getting started guides by @jcapriot in https://github.com/simpeg/simpeg/pull/1188
• Update DC1D for flexibility and speed by @jcapriot in https://github.com/simpeg/simpeg/pull/1191
• Start removing unused variables by @santisoler in https://github.com/simpeg/simpeg/pull/1161
• Fix check for reference_model in PGI regularization by @santisoler in https://github.com/simpeg/simpeg/pull/1196
• update JTV to work for an arbitrary number of models by @jcapriot in https://github.com/simpeg/simpeg/pull/1197
• Simulation of Simulations by @jcapriot in https://github.com/simpeg/simpeg/pull/1183
• Remove flake errors that were already solved by @santisoler in https://github.com/simpeg/simpeg/pull/1203
• Fix flake8 B015 errors: solve unused comparisons by @santisoler in https://github.com/simpeg/simpeg/pull/1200
• Fix flake E401 error: multiple imports in one line by @santisoler in https://github.com/simpeg/simpeg/pull/1202
• Patch/identity map init by @jcapriot in https://github.com/simpeg/simpeg/pull/1205
• Fix length scale getters by @jcapriot in https://github.com/simpeg/simpeg/pull/1207
• Patch/fix save sparse dict by @jcapriot in https://github.com/simpeg/simpeg/pull/1206
• Add PR template file by @jcapriot in https://github.com/simpeg/simpeg/pull/1208
• 0.19.0 Staging by @jcapriot in https://github.com/simpeg/simpeg/pull/1209

Full Changelog: https://github.com/simpeg/simpeg/compare/v0.18.1...v0.19.0