Remove Internals

Dotty bug tracked in scala/scala3#10769

Author: TimWSpence

core/src/main/scala/io/github/timwspence/cats/stm/STM.scala

@@ -52,7 +52,6 @@ object STM {
       idGen       <- Ref.of[F, Long](0)
       rateLimiter <- Semaphore[F](n)
     } yield new STM[F] {
-      import Internals._
 
       def commit[A](txn: Txn[A]): F[A] =
         for {

core/src/main/scala/io/github/timwspence/cats/stm/STMConstants.scala

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2020 TimWSpence
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.github.timwspence.cats.stm
+
+private[stm] object STMConstants {
+
+  type T = Byte
+  val PureT: T        = 0
+  val AllocT: T       = 1
+  val BindT: T        = 2
+  val HandleErrorT: T = 3
+  val GetT: T         = 4
+  val ModifyT: T      = 5
+  val OrElseT: T      = 6
+  val AbortT: T       = 7
+  val RetryT: T       = 8
+
+}