Geoalchemy2

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* Use setuptools_scm to manage versions adrien-berchet (271)
* Fix insert/update for RasterElement adrien-berchet (270)

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* Fix __eq__() method in _SpatialElement so it can work with any type adrien-berchet (265)

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* Fix ReadTheDoc compilation adrien-berchet

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* Fix Shapely requirements for Pypy adrien-berchet (262)
* Add a gallery with tests and doc based on examples given in 219, 244 and 251 adrien-berchet (260)
* Add support of the feature version of St_AsGeoJson() adrien-berchet zzzeek (258)
* Add __eq__ to WKBElement and make shape.from_shape() able to create extended elements adrien-berchet matthew-emw (247)
* Extract all SQL concepts from Elements and refactor Raster type adrien-berchet elemoine zzzeek (256)

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* Update test matrix removing Python 3.4 and adding 3.6, 3.7, 3.8 cjmayo (253)
* Add reflection example in doc adrien-berchet (252)
* Fix tests with PostGIS 3 elemoine (250)
* Add default compilation rules to elements and functions which are required for SQLAlchemy < 1.1 adrien-berchet (242)
* Raise an AttributeError when a function does not starts with ST_* adrien-berchet elemoine (240)
* Replace ST_Distance_Sphere by ST_DistanceSphere borisuvarov (237)
* Make shape.to_shape() work for extended WKTElement objects adrien-berchet (236)

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* Add some missing functions adrien-berchet (224)
* Do not register functions.GenericFunction for sqlalchemy>=1.3.4 adrien-berchet (226)
* Redefine the geometry_type/dimension consistency checks elemoine (228)
* Correct a spelling mistake EdwardBetts (229)
* Do not assume the "public" schema elemoine (231)
* Add all geometry constructors adrien-berchet (232)