Fix 2.13 compile

Author: armanbilge

core/src/main/scala-2/spire/macros/Auto.scala

@@ -165,9 +165,9 @@ abstract class AutoAlgebra extends AutoOps { ops =>
         // default implementations from EuclideanRing
         @tailrec final def euclid(a: A, b: A)(implicit ev: Eq[A]): A =
           if (isZero(b)) a else euclid(b, emod(a, b))
-        def gcd(a: A, b: A)(implicit ev: Eq[A]): A =
+        override def gcd(a: A, b: A)(implicit ev: Eq[A]): A =
           euclid(a, b)(ev)
-        def lcm(a: A, b: A)(implicit ev: Eq[A]): A =
+        override def lcm(a: A, b: A)(implicit ev: Eq[A]): A =
           if (isZero(a) || isZero(b)) zero else times(equot(a, gcd(a, b)), b)
 
         def zero: A = z.splice

tests/shared/src/test/scala-2/scala/spire/math/fpf/FpFilterSuite.scala

@@ -37,6 +37,8 @@ class FpFilterSuite extends munit.ScalaCheckSuite {
   // the exact case, since it'll fail with an Evaluated excetion.
   sealed trait Bad
   implicit object BadField extends Field[Bad] with IsReal[Bad] with NRoot[Bad] {
+    def order = this
+    def additiveCommutativeMonoid = this
     def zero: Bad = evaluated
     def one: Bad = evaluated
     def negate(a: Bad): Bad = evaluated