Update to Go 1.16

Fixes build failing due to goconvey dependency change

Author: szh

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Changed
+- The project Golang version is updated from the end-of-life v1.15 to version v1.16.
+  [cyberark/secretless-broker#1434](https://github.com/cyberark/secretless-broker/pull/1434/)
+
 ### Fixed
 - Request-signing on the AWS connector was updated to address a bug that was
   causing failed integrity checks, where the request-signing by Secretless was

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.15-buster as secretless-builder
+FROM golang:1.16-buster as secretless-builder
 MAINTAINER CyberArk Software Ltd.
 LABEL builder="secretless-builder"
 
@@ -23,6 +23,7 @@ ENV GOOS=linux \
 COPY go.mod go.sum /secretless/
 COPY third_party/ /secretless/third_party
 
+RUN go env -w GOFLAGS=-mod=mod
 RUN go mod download
 
 # secretless source files

Dockerfile.debug

@@ -1,4 +1,4 @@
-FROM golang:1.15-buster as secretless-builder
+FROM golang:1.16-buster as secretless-builder
 MAINTAINER CyberArk Software Ltd.
 LABEL builder="secretless-builder"
 
@@ -23,6 +23,7 @@ ENV GOOS=linux \
 COPY go.mod go.sum /secretless/
 COPY third_party/ /secretless/third_party
 
+RUN go env -w GOFLAGS=-mod=mod
 RUN go mod download
 
 # Compile Delve (for debugging)

Dockerfile.dev

@@ -1,4 +1,4 @@
-FROM golang:1.15-buster
+FROM golang:1.16-buster
 MAINTAINER CyberArk Software Ltd.
 
 # On CyberArk dev laptops, golang module dependencies are downloaded with a
@@ -53,6 +53,7 @@ RUN go get -u github.com/jstemmer/go-junit-report && \
 COPY go.mod go.sum /secretless/
 COPY third_party/ /secretless/third_party
 
+RUN go env -w GOFLAGS=-mod=mod
 RUN go mod download
 
 # TODO: all the stuff below this line is not needed

Dockerfile.test

@@ -1,4 +1,4 @@
-FROM golang:1.15-alpine
+FROM golang:1.16-alpine
 MAINTAINER CyberArk Software Ltd.
 LABEL id="secretless-test-runner"
 
@@ -24,6 +24,7 @@ RUN apk add -u curl \
 COPY go.mod go.sum /secretless/
 COPY third_party/ /secretless/third_party
 
+RUN go env -w GOFLAGS=-mod=mod
 RUN go mod download
 
 # go-junit-report => Convert go test output to junit xml

go.mod

@@ -60,4 +60,4 @@ replace github.com/denisenkom/go-mssqldb => ./third_party/go-mssqldb
 // This is our fix:
 replace honnef.co/go/tools => github.com/dominikh/go-tools v0.0.1-2019.2.3
 
-go 1.15
+go 1.16