fix typo

build.sbt

@@ -32,8 +32,6 @@ libraryDependencies += "org.scalacheck" %% s"scalacheck" % "1.14.2" % "test"
 fork in Test := true
 parallelExecution in Test := true
 
-addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.5")
-
 inThisBuild(List(
   organization := "com.github.yaooqinn",
   homepage := Some(url("https://github.com/yaooqinn/itachi")),

project/plugins.sbt

@@ -0,0 +1,18 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.5")