vendor: update gopkg.in/yaml.v2 to reflect current license

cmd/vendor/github.com/russross/blackfriday/inline.go

@@ -170,6 +170,10 @@ func lineBreak(p *parser, out *bytes.Buffer, data []byte, offset int) int {
 	precededByBackslash := offset >= 1 && data[offset-1] == '\\' // see http://spec.commonmark.org/0.18/#example-527
 	precededByBackslash = precededByBackslash && p.flags&EXTENSION_BACKSLASH_LINE_BREAK != 0
 
+	if p.flags&EXTENSION_JOIN_LINES != 0 {
+		return 1
+	}
+
 	// should there be a hard line break here?
 	if p.flags&EXTENSION_HARD_LINE_BREAK == 0 && !precededByTwoSpaces && !precededByBackslash {
 		return 0

cmd/vendor/github.com/russross/blackfriday/markdown.go

@@ -46,6 +46,7 @@ const (
 	EXTENSION_AUTO_HEADER_IDS                        // Create the header ID from the text
 	EXTENSION_BACKSLASH_LINE_BREAK                   // translate trailing backslashes into line breaks
 	EXTENSION_DEFINITION_LISTS                       // render definition lists
+	EXTENSION_JOIN_LINES                             // delete newline and join lines
 
 	commonHtmlFlags = 0 |
 		HTML_USE_XHTML |