Upgrade Julia to 1.6

Author: evetion

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ on:
   push:
     branches:
       - master
-    tags: '*'
+    tags: "*"
   pull_request:
     branches:
       - master
@@ -15,8 +15,8 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.3'
-          - '1.7'
+          - "1.6"
+          - "1"
         os:
           - ubuntu-latest
           - macOS-latest
@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
         with:
-          version: '1.7'
+          version: "1.7"
       - run: |
           julia --project=docs -e '
             using Pkg

Project.toml

@@ -17,7 +17,7 @@ IterTools = "1.3.0"
 StaticArrays = "0.12, 1.0"
 StructArrays = "0.6"
 Tables = "0.2, 1"
-julia = "1.3"
+julia = "1.6"
 
 [extras]
 OffsetArrays = "6fe1bfb0-de20-5000-8ca7-80f57d26f881"