diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 0000000..6c7f188
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,80 @@
+name: CI
+# Run on master, tags, or any pull request
+on:
+  schedule:
+    - cron: '0 1 * * *'  # Daily at 1 AM UTC (7 PM CST)
+  push:
+    branches: [master]
+    tags: ["*"]
+  pull_request:
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      # We test the latest 64-bit julia release for all 3 major platforms
+      matrix:
+        version:
+          - 1
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+        arch:
+          - x64
+        include:
+          # Add a 1.0 job just to make sure we still support it
+          - os: ubuntu-latest
+            version: 1.0.5
+            arch: x64
+          # Add a 32-bit job to ensure we don't have any 64-bit specific logic
+          - os: ubuntu-latest
+            version: 1
+            arch: x86
+    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@latest
+      - run: |
+          git config --global user.name Tester
+          git config --global user.email te@st.er
+      - uses: julia-actions/julia-runtest@latest
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v1
+        with:
+          file: lcov.info
+  # docs:
+  #   name: Documentation
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #     - uses: actions/checkout@v2
+  #     - uses: julia-actions/setup-julia@v1
+  #       with:
+  #         version: 1
+  #     - run: |
+  #         git config --global user.name name
+  #         git config --global user.email email
+  #         git config --global github.user username
+  #     - run: |
+  #         julia --project=docs -e '
+  #           using Pkg;
+  #           Pkg.develop(PackageSpec(path=pwd()));
+  #           Pkg.instantiate();
+  #           include("docs/make.jl");'
+  #       env:
+  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  #         DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
new file mode 100644
index 0000000..a1cfcdc
--- /dev/null
+++ b/.github/workflows/CompatHelper.yml
@@ -0,0 +1,16 @@
+name: CompatHelper
+on:
+  schedule:
+    - cron: '00 00 * * *'  # Everyday at midnight
+  workflow_dispatch:
+jobs:
+  CompatHelper:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Pkg.add("CompatHelper")
+        run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
+      - name: CompatHelper.main()
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
+        run: julia -e 'using CompatHelper; CompatHelper.main()'
diff --git a/.github/workflows/TagBot.yml b/.github/workflows/TagBot.yml
index d77d3a0..f49313b 100644
--- a/.github/workflows/TagBot.yml
+++ b/.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 }}
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 9fb6c19..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-environment:
-  matrix:
-  - julia_version: 1.0
-  - julia_version: nightly
-
-platform:
-  - x86 # 32-bit
-  - x64 # 64-bit
-
-## uncomment the following lines to allow failures on nightly julia
-## (tests will run but not make your overall status red)
-matrix:
-  allow_failures:
-    - julia_version: nightly
-
-branches:
-  only:
-    - master
-    - /release-.*/
-
-notifications:
-  - provider: Email
-    on_build_success: false
-    on_build_failure: false
-    on_build_status_changed: false
-
-install:
-  - ps: iex ((new-object net.webclient).DownloadString("https://raw.githubusercontent.com/JuliaCI/Appveyor.jl/version-1/bin/install.ps1"))
-
-build_script:
-  - echo "%JL_BUILD_SCRIPT%"
-  - C:\julia\bin\julia -e "%JL_BUILD_SCRIPT%"
-
-test_script:
-  - echo "%JL_TEST_SCRIPT%"
-  - C:\julia\bin\julia -e "%JL_TEST_SCRIPT%"
-
-# Uncomment to support code coverage upload. Should only be enabled for packages
-# which would have coverage gaps without running on Windows
-on_success:
-  - echo "%JL_CODECOV_SCRIPT%"
-  - C:\julia\bin\julia -e "%JL_CODECOV_SCRIPT%"