Update Dependencies (#390)

Co-authored-by: Norwin Roosen <git@nroo.de>
Co-authored-by: Norwin <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/390
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>

vendor/github.com/dlclark/regexp2/syntax/parser.go

@@ -1250,10 +1250,10 @@ func (p *parser) scanBasicBackslash(scanOnly bool) (*regexNode, error) {
 			return nil, nil
 		}
 
-		if p.useOptionE() || p.isCaptureSlot(capnum) {
+		if p.isCaptureSlot(capnum) {
 			return newRegexNodeM(ntRef, p.options, capnum), nil
 		}
-		if capnum <= 9 {
+		if capnum <= 9 && !p.useOptionE() {
 			return nil, p.getErr(ErrUndefinedBackRef, capnum)
 		}
 
@@ -1648,7 +1648,7 @@ func (p *parser) scanOptions() {
 }
 
 // Scans \ code for escape codes that map to single unicode chars.
-func (p *parser) scanCharEscape() (rune, error) {
+func (p *parser) scanCharEscape() (r rune, err error) {
 
 	ch := p.moveRightGetChar()
 
@@ -1657,16 +1657,22 @@ func (p *parser) scanCharEscape() (rune, error) {
 		return p.scanOctal(), nil
 	}
 
+	pos := p.textpos()
+
 	switch ch {
 	case 'x':
 		// support for \x{HEX} syntax from Perl and PCRE
 		if p.charsRight() > 0 && p.rightChar(0) == '{' {
+			if p.useOptionE() {
+				return ch, nil
+			}
 			p.moveRight(1)
 			return p.scanHexUntilBrace()
+		} else {
+			r, err = p.scanHex(2)
 		}
-		return p.scanHex(2)
 	case 'u':
-		return p.scanHex(4)
+		r, err = p.scanHex(4)
 	case 'a':
 		return '\u0007', nil
 	case 'b':
@@ -1684,13 +1690,18 @@ func (p *parser) scanCharEscape() (rune, error) {
 	case 'v':
 		return '\u000B', nil
 	case 'c':
-		return p.scanControl()
+		r, err = p.scanControl()
 	default:
 		if !p.useOptionE() && IsWordChar(ch) {
 			return 0, p.getErr(ErrUnrecognizedEscape, string(ch))
 		}
 		return ch, nil
 	}
+	if err != nil && p.useOptionE() {
+		p.textto(pos)
+		return ch, nil
+	}
+	return
 }
 
 // Grabs and converts an ascii control character
@@ -1807,12 +1818,12 @@ func (p *parser) scanOctal() rune {
 	//we know the first char is good because the caller had to check
 	i := 0
 	d := int(p.rightChar(0) - '0')
-	for c > 0 && d <= 7 {
-		i *= 8
-		i += d
-		if p.useOptionE() && i >= 0x20 {
+	for c > 0 && d <= 7 && d >= 0 {
+		if i >= 0x20 && p.useOptionE() {
 			break
 		}
+		i *= 8
+		i += d
 		c--
 
 		p.moveRight(1)