build docs with Github Actions (#188)

* build docs with Github Actions

* remove DOCUMENTER_KEY

Author: johnnychen94

.github/workflows/Documentation.yml

@@ -0,0 +1,39 @@
+name: Documentation
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'master'
+      - 'release-'
+    tags: '*'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: [1]
+        os: [ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@latest
+        with:
+          version: ${{ matrix.julia-version }}
+      - name: Cache artifacts
+        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 }}-
+      - name: Install dependencies
+        run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
+      - name: Build and deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: julia --project=docs/ docs/make.jl

.github/workflows/TagBot.yml

@@ -9,3 +9,4 @@ jobs:
       - uses: JuliaRegistries/TagBot@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+          ssh: ${{ secrets.TAGBOT }}

.travis.yml

@@ -29,4 +29,4 @@ Packages that appear to perform just a subset of what ImageFiltering does:
 [docs-stable-img]: https://img.shields.io/badge/docs-stable-blue.svg
 [docs-stable-url]: https://JuliaImages.github.io/ImageFiltering.jl/stable
 [docs-dev-img]: https://img.shields.io/badge/docs-dev-blue.svg
-[docs-dev-url]: https://JuliaImages.github.io/ImageFiltering.jl/latest
+[docs-dev-url]: https://JuliaImages.github.io/ImageFiltering.jl/dev