update changes in anticipation of release 4.1.0 (#198)

CHANGES.md

@@ -1,3 +1,39 @@
+# 4.1
+
+  * Switched to pyproject.toml (#195)
+
+  * pytest improvements allowing it to be run more easily (#194)
+
+  * plotvar.py script improvements (#178)
+
+  * a new viscous Burgers solver was added (#171)
+
+  * a new viscous incompressible solver was added with a lid-drive
+    cavity test problem (#138)
+
+  * the incompressible solver was synced up with the Burgers solver
+    (#168, #169)
+
+  * convergence.py can now take any variable and multiplicative
+    factor, as well as take 3 plotfiles to estimate convergence
+    directly. (#165)
+
+  * the multigrid solver output is now more compact (#161)
+
+  * plot.py can fill ghostcells now (#156)
+
+  * a new inviscid Burgers solver was added (#144)
+
+  * a new convergence_error.py script for incompressible was added to
+    make the convergence plot for that solver (#147)
+
+  * regression tests can now be run in parallel (#145)
+
+  * fixes for numpy > 1.20 (#137)
+
+  * we can now Ctrl+C to abort when visualization is on (#131)
+
+  * lots of pylint cleaning (#155, #152, #151, #143, #139)
 
 # 4.0