vendor: update all dependencies

* Update all dependencies
  * Remove all `[[constraint]]` from Gopkg.toml
  * Add in the minimum number of `[[override]]` to build
  * Remove go get of github.com/inconshreveable/mousetrap as it is vendored
  * Update docs with new policy on constraints

vendor/github.com/aws/aws-sdk-go/service/acm/errors.go

@@ -19,10 +19,7 @@ const (
 	// ErrCodeInvalidStateException for service response error code
 	// "InvalidStateException".
 	//
-	// Processing has reached an invalid state. For example, this exception can
-	// occur if the specified domain is not using email validation, or the current
-	// certificate status does not permit the requested operation. See the exception
-	// message returned by ACM to determine which state is not valid.
+	// Processing has reached an invalid state.
 	ErrCodeInvalidStateException = "InvalidStateException"
 
 	// ErrCodeInvalidTagException for service response error code
@@ -35,11 +32,7 @@ const (
 	// ErrCodeLimitExceededException for service response error code
 	// "LimitExceededException".
 	//
-	// An ACM limit has been exceeded. For example, you may have input more domains
-	// than are allowed or you've requested too many certificates for your account.
-	// See the exception message returned by ACM to determine which limit you have
-	// violated. For more information about ACM limits, see the Limits (http://docs.aws.amazon.com/acm/latest/userguide/acm-limits.html)
-	// topic.
+	// An ACM limit has been exceeded.
 	ErrCodeLimitExceededException = "LimitExceededException"
 
 	// ErrCodeRequestInProgressException for service response error code
@@ -59,7 +52,7 @@ const (
 	// ErrCodeResourceNotFoundException for service response error code
 	// "ResourceNotFoundException".
 	//
-	// The specified certificate cannot be found in the caller's account, or the
+	// The specified certificate cannot be found in the caller's account or the
 	// caller's account cannot be found.
 	ErrCodeResourceNotFoundException = "ResourceNotFoundException"