Remove Spek add Kotest

orx-noise/src/commonTest/kotlin/TestMathUtils.kt

@@ -0,0 +1,11 @@
+import io.kotest.core.spec.style.DescribeSpec
+import org.openrndr.extra.noise.fastFloor
+import kotlin.test.assertEquals
+
+class TestMathUtils : DescribeSpec({
+    describe("Fast floor") {
+        it("it is corrrect for 0.0") {
+            assertEquals(0, 0.0.fastFloor())
+        }
+    }
+})