Update Travis, GitHub, CircleCI and Snap to Go 1.16 (only)

Author: bep

.circleci/config.yml

@@ -1,6 +1,6 @@
 defaults: &defaults
   docker:
-      - image: bepsays/ci-goreleaser:1.15.1
+      - image: bepsays/ci-goreleaser:1.16.0
   environment:
     CGO_ENABLED: "0"
 

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
       GO111MODULE: on
     strategy:
       matrix:
-        go-version: [1.14.x, 1.15.x]
+        go-version: [1.16.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:

README.md

@@ -54,7 +54,7 @@ Use the [installation instructions in the Hugo documentation](https://gohugo.io/
 #### Prerequisite Tools
 
 * [Git](https://git-scm.com/)
-* [Go (we test it with the last 2 major versions)](https://golang.org/dl/)
+* [Go (we test it with the last 2 major versions; but note that Hugo 0.81.0 only builds with >= Go 1.16.)](https://golang.org/dl/)
 
 #### Fetch from GitHub
 

snap/snapcraft.yaml

@@ -26,7 +26,7 @@ parts:
 
   hugo:
     plugin: nil
-    build-snaps: [go/1.15/stable]
+    build-snaps: [go/1.16/stable]
     source: .
     override-build: |
       set -ex