fixed dependencies

vendor/github.com/go-latex/latex/tex/utils.go

@@ -0,0 +1,26 @@
+// Copyright ©2020 The go-latex Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tex
+
+func maxInt(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func clamp(v float64) float64 {
+	const (
+		min = -1000000000.
+		max = +1000000000.
+	)
+	switch {
+	case v < min:
+		return min
+	case v > max:
+		return max
+	}
+	return v
+}