Bump mergo to solve nil pointer like bug

Signed-off-by: Ulysses Souza <ulyssessouza@gmail.com>

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/docker/go-connections v0.4.0
 	github.com/docker/go-units v0.4.0
 	github.com/google/go-cmp v0.5.4
-	github.com/imdario/mergo v0.3.11
+	github.com/imdario/mergo v0.3.12-0.20210303221052-29fb3d3bdc55
 	github.com/joho/godotenv v1.3.0
 	github.com/mattn/go-shellwords v1.0.11
 	github.com/mitchellh/mapstructure v1.4.1

go.sum

@@ -47,8 +47,8 @@ github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/gorilla/handlers v1.5.1/go.mod h1:t8XrUpc4KVXb7HGyJ4/cEnwQiaxrX/hz1Zv/4g96P1Q=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
-github.com/imdario/mergo v0.3.11 h1:3tnifQM4i+fbajXKBHXWEH+KvNHqojZ778UH75j3bGA=
-github.com/imdario/mergo v0.3.11/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
+github.com/imdario/mergo v0.3.12-0.20210303221052-29fb3d3bdc55 h1:Z+928KmcMGWCKohke8GwDHOGQSlFQi2dg3uUbD5WDJA=
+github.com/imdario/mergo v0.3.12-0.20210303221052-29fb3d3bdc55/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=