Update vendor for next release (#1343)

vendor/github.com/mattermost/mattermost-server/v5/utils/markdown/autolink.go

@@ -14,6 +14,7 @@ import (
 
 var (
 	DefaultUrlSchemes = []string{"http", "https", "ftp", "mailto", "tel"}
+	wwwAutoLinkRegex  = regexp.MustCompile(`^www\d{0,3}\.`)
 )
 
 // Given a string with a w at the given position, tries to parse and return a range containing a www link.
@@ -30,7 +31,7 @@ func parseWWWAutolink(data string, position int) (Range, bool) {
 	}
 
 	// Check that this starts with www
-	if len(data)-position < 4 || !regexp.MustCompile(`^www\d{0,3}\.`).MatchString(data[position:]) {
+	if len(data)-position < 4 || !wwwAutoLinkRegex.MatchString(data[position:]) {
 		return Range{}, false
 	}
 
@@ -59,9 +60,8 @@ func isAllowedBeforeWWWLink(c byte) bool {
 	switch c {
 	case '*', '_', '~', ')':
 		return true
-	default:
-		return false
 	}
+	return false
 }
 
 // Given a string with a : at the given position, tried to parse and return a range containing a URL scheme
@@ -153,9 +153,8 @@ func checkDomain(data string, allowShort bool) int {
 	// this is called from parseWWWAutolink
 	if foundPeriod {
 		return i
-	} else {
-		return 0
 	}
+	return 0
 }
 
 // Returns true if the provided link starts with a valid character for a domain name. Equivalent to
@@ -251,7 +250,6 @@ func canEndAutolink(c rune) bool {
 	switch c {
 	case '?', '!', '.', ',', ':', '*', '_', '~', '\'', '"':
 		return false
-	default:
-		return true
 	}
+	return true
 }