Fix proj 7 homebrew formula

proj-sys/PROJSRC/proj/proj-8.1.0/AUTHORS

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+--------------------------------------------------------------------------------
+Authors
+--------------------------------------------------------------------------------
+
+Original Author
+................................................................................
+
+Gerald Evenden (1935-2016)
+
+Maintainer(s)
+................................................................................
+
+Kristian Evers <[email protected]>
+Even Rouault <[email protected]>
+
+
+Project Steering Committee
+--------------------------------------------------------------------------------
+
+Process and membership can be found at:
+https://proj.org/community/rfc/rfc-1.html
+
+Chair
+................................................................................
+
+Kristian Evers <[email protected]>
+
+Members
+................................................................................
+
+Frank Warmerdam <[email protected]>
+Howard Butler <[email protected]>
+Charles Karney <[email protected]>
+Thomas Knudsen <[email protected]>
+Even Rouault <[email protected]>
+Kurt Schwehr <[email protected]>
+
+Contributors
+--------------------------------------------------------------------------------
+
+The full list of contributors can be found on GitHub
+https://github.com/OSGeo/PROJ/graphs/contributors

proj-sys/PROJSRC/proj/proj-8.1.0/CITATION

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+To cite PROJ in publications use:
+
+  PROJ contributors (2020). PROJ coordinate transformation software
+  library. Open Source Geospatial Foundation. URL https://proj.org/.
+
+A BibTeX entry for LaTeX users is
+
+.. code-block:: latex
+
+  @Manual{,
+    title = {{PROJ} coordinate transformation software library},
+    author = {{PROJ contributors}},
+    organization = {Open Source Geospatial Foundation},
+    year = {2021},
+    url = {https://proj.org/},
+  }