implement Blake2b and Blake2s

src/commonTest/kotlin/com/infendro/hash/blake2/Blake2s-256.kt

@@ -0,0 +1,34 @@
+package com.infendro.hash.blake2
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `Blake2s-256 Test` {
+    val function = Blake2s(32)
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(32, function.bytes)
+        assertEquals(256, function.bits)
+        assertEquals(64, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x69U, 0x21U, 0x7aU, 0x30U,
+            0x79U, 0x90U, 0x80U, 0x94U,
+            0xe1U, 0x11U, 0x21U, 0xd0U,
+            0x42U, 0x35U, 0x4aU, 0x7cU,
+            0x1fU, 0x55U, 0xb6U, 0x48U,
+            0x2cU, 0xa1U, 0xa5U, 0x1eU,
+            0x1bU, 0x25U, 0x0dU, 0xfdU,
+            0x1eU, 0xd0U, 0xeeU, 0xf9U,
+        )
+        val actual = function.hash(
+            UByteArray(0)
+        )
+        assertContentEquals(expected, actual)
+    }
+}