Upgrade dependencies (#42)

Upgrade all dependencies of the project. Most are transitive, but the direct
have no notable changes.

Author: Bjørn

go.mod

@@ -3,16 +3,17 @@ module github.com/lunarway/snyk_exporter
 go 1.13
 
 require (
-	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
-	github.com/google/go-cmp v0.3.1 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/prometheus/client_golang v1.1.0
-	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
-	github.com/prometheus/common v0.7.0
-	github.com/prometheus/procfs v0.0.5 // indirect
-	golang.org/x/sys v0.0.0-20191007092633-5f54ce542709 // indirect
+	github.com/alecthomas/units v0.0.0-20201120081800-1786d5ef83d4 // indirect
+	github.com/google/go-cmp v0.5.4 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/prometheus/client_golang v1.8.0
+	github.com/prometheus/common v0.15.0
+	github.com/sirupsen/logrus v1.7.0 // indirect
+	github.com/stretchr/testify v1.6.1 // indirect
+	golang.org/x/sys v0.0.0-20201204225414-ed752295db88 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
-	gopkg.in/yaml.v2 v2.2.4 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 )