Tidy dependent modules to reflect github.com/spf13/cobra bump

The bump of the `github.com/spf13/cobra` dependency of the project's root `github.com/arduino/arduino-lint` module also
requires updates to the dependencies data of the projects modules which depend on `github.com/arduino/arduino-lint`.

Author: per1234

docsgen/go.mod

@@ -11,7 +11,7 @@ replace github.com/oleiade/reflections => github.com/oleiade/reflections v1.0.1
 
 require (
 	github.com/arduino/arduino-lint v0.0.0
-	github.com/spf13/cobra v1.3.0
+	github.com/spf13/cobra v1.4.0
 )
 
 require (

docsgen/go.sum

@@ -61,7 +61,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/spf13/afero v1.6.0 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
-	github.com/spf13/cobra v1.3.0 // indirect
+	github.com/spf13/cobra v1.4.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/sqs/goreturns v0.0.0-20181028201513-538ac6014518 // indirect