R2020a is too unstable

Author: scivision

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        release: [R2020b, R2021a, R2021b, R2022a, R2023a, R2023b, R2024a]
+        release: [R2021a, R2021b, R2022a, R2023a, R2023b, R2024a]
         include:
         - os: macos-latest
           release: R2024a

Readme.md

@@ -7,7 +7,7 @@
 Matlab users coming from other languages often notice the missing functionality contained within this user-developed, unofficial "stdlib" for Matlab.
 These system "sys", file I/O "fileio" and HDF5/NetCDF "hdf5nc" function are useful across several of our own and others projects.
 
-The absolute minimum Matlab release is R2020b.
+The absolute minimum Matlab release is R2021a.
 NetCDF4 string support requires Matlab >= R2021b.
 
 Self-tests can be run from that matlab-stdlib/ directory: