fix julia version in github actions

Author: j-fu

.github/workflows/ci.yml

@@ -15,9 +15,9 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.5' # Replace this with the minimum Julia version that your package supports. E.g. if your package requires Julia 1.5 or higher, change this to '1.5'.
+          - '1.6' # Replace this with the minimum Julia version that your package supports. E.g. if your package requires Julia 1.5 or higher, change this to '1.5'.
           - '1'   # Leave this line unchanged. '1' will automatically expand to the latest stable 1.x release of Julia.
-#          - 'nightly'
+          - 'nightly'
         os:
           - ubuntu-latest
           - macos-latest

README.md

@@ -20,8 +20,8 @@ Any linear algebra method on `ExtendableSparseMatrix` starts with a `flush!` met
 
 ## Caveat
 
-This package assumes that a $m \times n$  matrix is sparse if *each* row and *each* column have less than $C$ entries with
-$C << n$ and $C <<m$ . Adding a full matrix row will be a performance hit.
+This package assumes that a $ m \times n $  matrix is sparse if *each* row and *each* column have less than $ C $ entries with
+$ C << n$ and $C <<m $ . Adding a full matrix row will be a performance hit.
 
 
 ## Working with ForwardDiff