Upgrade to Go 1.14, drop "vendor/"

This also upgrades:

* github.com/golangci/golangci-lint v1.23.8
* github.com/google/go-cmp v0.4.0
* github.com/pkg/errors v0.9.1

.circleci/config.yml

@@ -3,22 +3,22 @@ version: 2
 jobs:
   test:
     docker:
-      - image: circleci/golang:1.13.1
+      - image: circleci/golang:1.14.0
     steps:
       - checkout
       - run: go mod download
       - run: go get -v -t -d ./...
       - run: go test -v ./...
   build:
     docker:
-      - image: circleci/golang:1.13.1
+      - image: circleci/golang:1.14.0
     steps:
       - checkout
       - run: go build github.com/MarioCarrion/nit/testdata
       - run: go build github.com/MarioCarrion/nit/cmd/nit
   lint:
     docker:
-      - image: circleci/golang:1.13.1
+      - image: circleci/golang:1.14.0
     steps:
       - checkout
       - run: go mod tidy
@@ -28,7 +28,7 @@ jobs:
       - run: nit -pkg github.com/MarioCarrion/nit github.com/MarioCarrion/nit github.com/MarioCarrion/nit/cmd/nit
   release:
     docker:
-      - image: circleci/golang:1.13.1
+      - image: circleci/golang:1.14.0
     steps:
       - checkout
       - run: curl -sL https://git.io/goreleaser | bash

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.11.4-alpine3.8
+FROM golang:1.14.0-alpine3.11
 
 WORKDIR /
 

README.md

@@ -38,8 +38,7 @@ Fancy State Machine explaining the rules above:
 
 ## Installing
 
-* Using `go` (< 11.1): `go install github.com/MarioCarrion/nit/cmd/nit` **or** download a precompiled release.
-* Using `go` (>= 1.11): `GO111MODULE=on go get github.com/MarioCarrion/nit/cmd/nit@v0.6.0`, for installing v0.6.0 for example; see the releases for other versions.
+* Using `go` (>= 1.13): `go get github.com/MarioCarrion/nit/cmd/nit@v0.6.0`, for installing v0.6.0 for example; see the releases for other versions.
 * Using it as a dependency with the [`tools.go` paradigm](/~https://github.com/go-modules-by-example/index/blob/master/010_tools/README.md):
 
 ```go
@@ -64,4 +63,4 @@ Please use `nit -h` for other available arguments.
 
 ## Development requirements
 
-Go >= 1.13.1
+Go >= 1.14.0

cmd/nit/main.go

@@ -72,7 +72,7 @@ func main() {
 	for _, pkg := range flag.Args() {
 		p, err := build.Import(pkg, ".", 0)
 		if err != nil {
-			fmt.Printf("error importing %s\n", pkg)
+			fmt.Printf("error importing %s: %s\n", pkg, err)
 			os.Exit(1)
 		}
 

go.mod

@@ -1,9 +1,9 @@
 module github.com/MarioCarrion/nit
 
-go 1.13
+go 1.14
 
 require (
-	github.com/golangci/golangci-lint v1.23.3
-	github.com/google/go-cmp v0.2.0
-	github.com/pkg/errors v0.8.1
+	github.com/golangci/golangci-lint v1.23.8
+	github.com/google/go-cmp v0.4.0
+	github.com/pkg/errors v0.9.1
 )

go.sum

@@ -91,8 +91,8 @@ github.com/golangci/gocyclo v0.0.0-20180528134321-2becd97e67ee h1:J2XAy40+7yz70u
 github.com/golangci/gocyclo v0.0.0-20180528134321-2becd97e67ee/go.mod h1:ozx7R9SIwqmqf5pRP90DhR2Oay2UIjGuKheCBCNwAYU=
 github.com/golangci/gofmt v0.0.0-20190930125516-244bba706f1a h1:iR3fYXUjHCR97qWS8ch1y9zPNsgXThGwjKPrYfqMPks=
 github.com/golangci/gofmt v0.0.0-20190930125516-244bba706f1a/go.mod h1:9qCChq59u/eW8im404Q2WWTrnBUQKjpNYKMbU4M7EFU=
-github.com/golangci/golangci-lint v1.23.3 h1:wkACDEoy+b0CVqnSK8BbWrVkN2tsVLUA1+SIkGSm4o0=
-github.com/golangci/golangci-lint v1.23.3/go.mod h1:LNexeEyqT5hQH7v47e67JekL0V51lXFUjbPkopxNSK4=
+github.com/golangci/golangci-lint v1.23.8 h1:NlD+Ld2TKH8qVmADy4iEvPxVmXaqPIeQu3d1cGQP4jc=
+github.com/golangci/golangci-lint v1.23.8/go.mod h1:g/38bxfhp4rI7zeWSxcdIeHTQGS58TCak8FYcyCmavQ=
 github.com/golangci/ineffassign v0.0.0-20190609212857-42439a7714cc h1:gLLhTLMk2/SutryVJ6D4VZCU3CUqr8YloG7FPIBWFpI=
 github.com/golangci/ineffassign v0.0.0-20190609212857-42439a7714cc/go.mod h1:e5tpTHCfVze+7EpLEozzMB3eafxo2KT5veNg1k6byQU=
 github.com/golangci/lint-1 v0.0.0-20191013205115-297bf364a8e0 h1:MfyDlzVjl1hoaPzPD4Gpb/QgoRfSBR0jdhwGyAWwMSA=
@@ -110,6 +110,8 @@ github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4/go.mod h1:Izgrg
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
@@ -189,6 +191,8 @@ github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
@@ -278,6 +282,7 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee h1:WG0RUwxtNT4qqaXX3DPA8zHFNm/D9xaBpxzHt1WcA/E=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -332,9 +337,13 @@ golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191113232020-e2727e816f5a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200102140908-9497f49d5709 h1:AfG1EmoRkFK24HWWLxSrRKNg2G+oA3JVOG8GJsHWypQ=
 golang.org/x/tools v0.0.0-20200102140908-9497f49d5709/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200204192400-7124308813f3 h1:Ms82wn6YK4ZycO6Bxyh0kxX3gFFVGo79CCuc52xgcys=
+golang.org/x/tools v0.0.0-20200204192400-7124308813f3/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=