stop testing on 1.0

Author: PhilipVinc

.github/workflows/aot.yml

@@ -18,6 +18,7 @@ jobs:
         architecture: [x64]
         python-version: ['3.x']
         julia-version:
+          - '1.6'
           - '1'
           - '~1.7'
           # - 'nightly'  # TODO: reenable

.github/workflows/conda.yml

@@ -18,7 +18,7 @@ jobs:
           - macos-latest
           - windows-latest
         architecture: [x64]
-        julia-version: ['1']
+        julia-version: ['1.6', '1']
         include:
           - os: windows-latest
             architecture: x86

.github/workflows/system.yml

@@ -20,7 +20,7 @@ jobs:
         architecture: [x64]
         python-version: ['3.x']
         julia-version:
-          - '1.0'
+          - '1.6'
           - '1'
           - 'nightly'
         include: