Use cgo-free SQL driver and add limit of 100 to maxVoters

internal/validator/validator.go

@@ -64,6 +64,10 @@ func GreaterThan(value int, n int) bool {
 	return value > n
 }
 
+func LesserThan(value int, n int) bool {
+	return value < n
+}
+
 func GreaterThanOrEquals(value int, n int) bool {
 	return value >= n
 }