Update Go module for basic-auth and remove Gopkg file

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

auth/basic-auth/Gopkg.lock

-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  digest = "1:1fa5fe80531abdddbdf5d3c467144cf66e29dd939878c6b53f4c67d2bf1970be"
-  name = "github.com/openfaas/faas-provider"
-  packages = ["auth"]
-  pruneopts = "UT"
-  revision = "8699aa7d3999c17851f88640c0dd2291daafd45e"
-  version = "0.13.0"
-
-[[projects]]
-  digest = "1:cf31692c14422fa27c83a05292eb5cbe0fb2775972e8f1f8446a71549bd8980b"
-  name = "github.com/pkg/errors"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "ba968bfe8b2f7e042a574c888954fccecfa385b4"
-  version = "v0.8.1"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  input-imports = [
-    "github.com/openfaas/faas-provider/auth",
-    "github.com/pkg/errors",
-  ]
-  solver-name = "gps-cdcl"
-  solver-version = 1

auth/basic-auth/Gopkg.toml

-[[constraint]]
-  name = "github.com/openfaas/faas-provider"
-  version = "0.13.0"
-
-[prune]
-  go-tests = true
-  unused-packages = true

auth/basic-auth/go.mod

 module github.com/openfaas/faas/auth/basic-auth
 
-go 1.15
+go 1.17
 
 require (
-	github.com/openfaas/faas-provider v0.17.0
+	github.com/openfaas/faas-provider v0.18.9
 	github.com/pkg/errors v0.8.1
 )

auth/basic-auth/go.sum

@@ -3,8 +3,8 @@ github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB7
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/openfaas/faas-provider v0.17.0 h1:4rT8CosKhI5xaAMqbyihEgR6KefO/ViJdF0a8THTgwM=
-github.com/openfaas/faas-provider v0.17.0/go.mod h1:fq1JL0mX4rNvVVvRLaLRJ3H6o667sHuyP5p/7SZEe98=
+github.com/openfaas/faas-provider v0.18.9 h1:nHPlq9PYLGLuyhuXfASlBPOvXiZC/fJqHOr6m+0Fn1s=
+github.com/openfaas/faas-provider v0.18.9/go.mod h1:S217qfIaMrv+XKJxgbhBzJzCfyFvoIF+BvYdDo6XIDQ=
 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/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=

auth/basic-auth/vendor/modules.txt

-# github.com/openfaas/faas-provider v0.17.0
-## explicit
+# github.com/openfaas/faas-provider v0.18.9
+## explicit; go 1.16
 github.com/openfaas/faas-provider/auth
 # github.com/pkg/errors v0.8.1
 ## explicit