Update dependencies

vendor/modernc.org/mathutil/CONTRIBUTORS

@@ -12,3 +12,4 @@ Faiz Abbasi <faizamodo@gmail.com>
 Gary Burd <gary@beagledreams.com>
 Jan Mercl <0xjnml@gmail.com>
 Muhammad Surya <surya.asriadie@gmail.com>
+Santiago De la Cruz <delacruzsantiago12@gmail.com>

vendor/modernc.org/mathutil/binarylog.go

@@ -6,8 +6,6 @@ package mathutil // import "modernc.org/mathutil"
 
 import (
 	"math/big"
-
-	"github.com/remyoudompheng/bigfft"
 )
 
 type float struct {
@@ -55,12 +53,6 @@ func (f *float) div2() {
 	f.normalize()
 }
 
-func (f *float) sqr() {
-	f.n = bigfft.Mul(f.n, f.n)
-	f.fracBits *= 2
-	f.normalize()
-}
-
 // BinaryLog computes the binary logarithm of n. The result consists of a
 // characteristic and a mantissa having precision mantissaBits. The value of
 // the binary logarithm is

vendor/modernc.org/mathutil/sqr.go

@@ -0,0 +1,11 @@
+// +build !riscv64
+
+package mathutil
+
+import "github.com/remyoudompheng/bigfft"
+
+func (f *float) sqr() {
+	f.n = bigfft.Mul(f.n, f.n)
+	f.fracBits *= 2
+	f.normalize()
+}

vendor/modernc.org/mathutil/sqr_std.go

@@ -0,0 +1,9 @@
+// +build riscv64
+
+package mathutil
+
+func (f *float) sqr() {
+	f.n.Mul(f.n, f.n)
+	f.fracBits *= 2
+	f.normalize()
+}