update errors library in module files

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/grufwub/go-bufpools v0.1.1
 	github.com/grufwub/go-config v0.1.0
-	github.com/grufwub/go-errors v0.2.1
+	github.com/grufwub/go-errors v0.3.1
 	github.com/grufwub/go-filecache v0.1.0
 	github.com/grufwub/go-logger v0.1.1
 )

go.sum

@@ -4,8 +4,8 @@ github.com/grufwub/go-bufpools v0.1.1 h1:TOUKNY+UaQ784EtvP+wKoXssYQQRX5zewtrZ7u4
 github.com/grufwub/go-bufpools v0.1.1/go.mod h1:ITqLRtG+W1bZHGdkWewV7inb+GcWfq2Jcjqx4AZ7aBY=
 github.com/grufwub/go-config v0.1.0 h1:/UDEmprs4h4qEkgmQqthmtGZeJs8eB44qMVSqa+5sxU=
 github.com/grufwub/go-config v0.1.0/go.mod h1:0U5Y0EkNeL09YkY70fNZv4Kelfayp/VroEs2UzmUG04=
-github.com/grufwub/go-errors v0.2.1 h1:uzJOCA3YDuBzbyz1bqIBDliEiVa3HR6xtWpYDW+lHQ4=
-github.com/grufwub/go-errors v0.2.1/go.mod h1:AXGtU2fWv8ejaUUT0+9wTOlWqcxYDo8wuYnhrYtoBKM=
+github.com/grufwub/go-errors v0.3.1 h1:Q0N5njkkFgAquX26MmNctonYD86htRly8yEZyWIhF+E=
+github.com/grufwub/go-errors v0.3.1/go.mod h1:AXGtU2fWv8ejaUUT0+9wTOlWqcxYDo8wuYnhrYtoBKM=
 github.com/grufwub/go-filecache v0.1.0 h1:OugzIHzLco8LLRnAlD7m6zSFQTILjltNO8Hhr/8vcCo=
 github.com/grufwub/go-filecache v0.1.0/go.mod h1:iAfqEfsC5YsyGD+f8JducuWeRqCDBVPi1+VmCaPL07Q=
 github.com/grufwub/go-logger v0.1.1 h1:KnD6NNyeq3cz6dZKW/Gr+Fz9dNvkLf8KvYZXKGM5cN0=