Update Go version to 1.14

Author: lucacome

.travis.yml

@@ -3,7 +3,7 @@ sudo: required
 services:
 - docker
 go:
-- "1.13"
+- "1.14"
 script:
 - echo "Nginx Prometheus Exporter - commit:${TRAVIS_COMMIT}"
 - make test

build/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13 as builder
+FROM golang:1.14 as builder
 ARG VERSION
 ARG GIT_COMMIT
 WORKDIR /go/src/github.com/nginxinc/nginx-prometheus-exporter

go.mod

@@ -1,6 +1,6 @@
 module github.com/nginxinc/nginx-prometheus-exporter
 
-go 1.13
+go 1.14
 
 require (
 	github.com/nginxinc/nginx-plus-go-client v0.6.0

vendor/modules.txt

@@ -11,14 +11,17 @@ github.com/golang/protobuf/ptypes/timestamp
 # github.com/matttproud/golang_protobuf_extensions v1.0.1
 github.com/matttproud/golang_protobuf_extensions/pbutil
 # github.com/nginxinc/nginx-plus-go-client v0.6.0
+## explicit
 github.com/nginxinc/nginx-plus-go-client/client
 # github.com/prometheus/client_golang v1.3.0
+## explicit
 github.com/prometheus/client_golang/prometheus
 github.com/prometheus/client_golang/prometheus/internal
 github.com/prometheus/client_golang/prometheus/promhttp
 # github.com/prometheus/client_model v0.2.0
 github.com/prometheus/client_model/go
 # github.com/prometheus/common v0.9.1
+## explicit
 github.com/prometheus/common/expfmt
 github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg
 github.com/prometheus/common/model
@@ -27,4 +30,5 @@ github.com/prometheus/procfs
 github.com/prometheus/procfs/internal/fs
 github.com/prometheus/procfs/internal/util
 # golang.org/x/sys v0.0.0-20200120151820-655fe14d7479
+## explicit
 golang.org/x/sys/windows