Update to Documenter 0.27, change from Travis to GH Actions. (#5)

Author: fredrikekre

.documenter.enc

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags: '*'
+  pull_request:
+
+jobs:
+  build:
+    name: Page build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: '1'
+      - name: Install dependencies
+        run: julia --project -e 'using Pkg; Pkg.instantiate()'
+      - name: Build and deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
+        run: julia --project --color=yes make.jl

.github/workflows/ci.yml

@@ -3,4 +3,4 @@ Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
 [compat]
-Documenter = "0.22"
+Documenter = "0.27.3"

.travis.yml

@@ -56,4 +56,6 @@ deploydocs(
     repo = "github.com/JuliaDocs/juliadocs.github.io.git",
     branch = "master",
     devbranch = "source",
+    versions = nothing,
+    push_preview = true,
 )