chore(workflow): remove py36 check (Megvii-BaseDetection#1590)

chore(workflow): remove py36 check

Author: Joker316701882

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.7, 3.8]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps: