Bump go version

.github/workflows/continuous_delivery.yaml

@@ -20,6 +20,8 @@ jobs:
     steps:
     - name: Setup
       uses: actions/setup-go@v2
+      with:
+        go-version: '1.16'
 
     - name: Checkout
       uses: actions/checkout@v2
@@ -46,6 +48,8 @@ jobs:
         go_version:
         - '1.13'
         - '1.14'
+        - '1.15'
+
     steps:
     - name: Setup
       uses: actions/setup-go@v2

Dockerfile

-FROM golang:1.15
+FROM golang:1.16
 
 WORKDIR /go/src/github.com/mccutchen/go-httpbin