drop 1.5

Author: chriselrod

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.5'
+          - '1.6'
           - '1' # automatically expands to the latest stable 1.x release of Julia.
         os:
           - ubuntu-latest

Project.toml

@@ -47,4 +47,4 @@ Static = "0.3.3, 0.4, 0.6"
 ThreadingUtilities = "0.5"
 UnPack = "1"
 VectorizationBase = "0.21.21"
-julia = "1.5"
+julia = "1.6"