Release v0.58.0 (#17)

* upgrade: Hugo to v0.58.0
* fix: push workflow
* remove: tag filter from push workflow
* upgrade: base image golang to 1.13.0

- https://gohugo.io/news/0.58.0-relnotes/
- https://discourse.gohugo.io/t/hugo-benchmarks-go-1-12-vs-go-1-13/20572

.github/workflows/push.yml

@@ -2,16 +2,17 @@ name: Push workflow
 
 on:
   push:
-    tags:
-    - invalid-tag
+    branches:
+    - master
+    - 'release-v*'
 
 jobs:
   test:
     runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@master
+
     - name: Docker build and print Hugo version
-      if: github.event.deleted == false
       env:
         DOCKER_IMAGE: ${{ github.repository }}:${{ github.sha }}
       run: |