chore(deps): bump chroma to v2 #735

Bump `alecthomas/chroma` to `v2`:
https://github.com/cheat/cheat/issues/735

vendor/github.com/alecthomas/chroma/v2/lexers/mysql.go

@@ -0,0 +1,33 @@
+package lexers
+
+import (
+	"regexp"
+)
+
+var (
+	mysqlAnalyserNameBetweenBacktickRe = regexp.MustCompile("`[a-zA-Z_]\\w*`")
+	mysqlAnalyserNameBetweenBracketRe  = regexp.MustCompile(`\[[a-zA-Z_]\w*\]`)
+)
+
+func init() { // nolint: gochecknoinits
+	Get("mysql").
+		SetAnalyser(func(text string) float32 {
+			nameBetweenBacktickCount := len(mysqlAnalyserNameBetweenBacktickRe.FindAllString(text, -1))
+			nameBetweenBracketCount := len(mysqlAnalyserNameBetweenBracketRe.FindAllString(text, -1))
+
+			var result float32
+
+			// Same logic as above in the TSQL analysis.
+			dialectNameCount := nameBetweenBacktickCount + nameBetweenBracketCount
+			if dialectNameCount >= 1 && nameBetweenBacktickCount >= (2*nameBetweenBracketCount) {
+				// Found at least twice as many `name` as [name].
+				result += 0.5
+			} else if nameBetweenBacktickCount > nameBetweenBracketCount {
+				result += 0.2
+			} else if nameBetweenBacktickCount > 0 {
+				result += 0.1
+			}
+
+			return result
+		})
+}