bump julia support to 1.6

Author: ablaom

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
+          - '1.6'
           - '1'
         os:
           - ubuntu-latest

Project.toml

@@ -9,7 +9,7 @@ ScientificTypesBase = "30f210dd-8aff-4c5f-94ba-8e64358c1161"
 [compat]
 REPL = "1.11.0"
 ScientificTypesBase = "1, 2, 3"
-julia = "^1"
+julia = "1.6"
 
 [extras]
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"