Switch to GitHub Actions for CI

Also updates:
- TagBot workflow for triggers
- adds version-check on a test that no longer errors
  on Julia 1.7 (#39228)

.github/workflows/CI.yml

@@ -0,0 +1,51 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+    tags: '*'
+jobs:
+  test:
+    name: Julia \${{ matrix.version }} - \${{ matrix.os }} - \${{ matrix.arch }} - \${{ github.event_name }}
+    runs-on: \${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - 1.0
+          - 1.1
+          - 1.2
+          - 1.3
+          - 1.4
+          - 1.5
+          - 1.6
+          - nightly
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+        arch:
+          - x64
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: \${{ matrix.version }}
+          arch: \${{ matrix.arch }}
+      - uses: actions/cache@v1
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: \${{ runner.os }}-test-\${{ env.cache-name }}-\${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            \${{ runner.os }}-test-\${{ env.cache-name }}-
+            \${{ runner.os }}-test-
+            \${{ runner.os }}-
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v1
+        with:
+          file: lcov.info

.github/workflows/TagBot.yml

@@ -1,11 +1,15 @@
 name: TagBot
 on:
-  schedule:
-    - cron: 0 * * * *
+  issue_comment:
+    types:
+      - created
+  workflow_dispatch:
 jobs:
   TagBot:
+    if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
     runs-on: ubuntu-latest
     steps:
       - uses: JuliaRegistries/TagBot@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+          ssh: ${{ secrets.DOCUMENTER_KEY }}

test/runtests.jl

@@ -41,7 +41,7 @@ end
 # Support for positional `stop`
 @test range(0, 5, length = 6) == 0.0:1.0:5.0
 @test range(0, 10, step = 2) == 0:2:10
-@test_throws ArgumentError range(0, 10)
+Base.VERSION < v"1.7.0-DEV.445" && @test_throws ArgumentError range(0, 10)
 
 mutable struct TLayout
     x::Int8