update version number in readme

Author: SethTisue

Diff for: README.md

@@ -13,7 +13,7 @@ the Sonatype web UI will then send the artifacts to Maven Central.
 Add the plugin to the `project/plugins.sbt` file:
 
 ```
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "1.0.9")
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "1.0.12")
 ```
 
 Then, in your `build.sbt` add:
@@ -44,7 +44,7 @@ scalaVersionsByJvm in ThisBuild := {
     9 -> List(v212, v213, v211).map(_ -> false))
 }
 
-mimaPreviousVersion := Some("1.0.9") // enables MiMa (`None` by default, which disables it)
+mimaPreviousVersion := Some("1.0.0") // enables MiMa (`None` by default, which disables it)
 
 OsgiKeys.exportPackage := Seq(s"<exported package>;version=${version.value}")
 
@@ -76,7 +76,7 @@ Tag the release and add release notes to https://github.com/scala/sbt-scala-modu
 - Make sure the current `HEAD` is a tagged revision. In sbt, `version` (set by sbt-git) should be according to a tag.
 
       > version
-      [info] 1.0.9
+      [info] 1.0.12
 
 - Run `publish` in sbt. If you don't have a `~/.bintray/.credentials` file, the sbt-bintray plugin will ask you for your
   username and API key. The API key can be obtained under "Edit Profile" (https://bintray.com/profile/edit). The sbt-bintray