update go version

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.14
+        go-version: 1.15
       id: go
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2

Dockerfile.npc

@@ -1,4 +1,4 @@
-FROM golang:1.14 as builder
+FROM golang:1.15 as builder
 ARG GOPROXY=direct
 WORKDIR /go/src/ehang.io/nps
 COPY . .

Dockerfile.nps

@@ -1,4 +1,4 @@
-FROM golang:1.14 as builder
+FROM golang:1.15 as builder
 ARG GOPROXY=direct
 WORKDIR /go/src/ehang.io/nps
 COPY . .

go.mod

@@ -1,6 +1,6 @@
 module ehang.io/nps
 
-go 1.14
+go 1.15
 
 require (
 	ehang.io/nps-mux v0.0.0-20210407130203-4afa0c10c992