update sbt plugins

scalafmt plugin commands changed. see
- scalameta/scalafmt#1085
- https://github.com/scalameta/scalafmt/blob/v1.4.0/scalafmt-sbt/src/main/scala/org/scalafmt/sbt/ScalafmtPlugin.scala#L18-L32

README.md

@@ -74,7 +74,7 @@ Here is a list of sbt commands for daily development:
 > findbugs                                 # Produce findbugs report in target/findbugs
 > jacoco:cover                             # Report the code coverage of tests to target/jacoco folder
 > jcheckStyle                              # Run check style
-> scalafmt                                 # Reformat Scala codes
+> ;scalafmt;test:scalafmt;scalafmtSbt      # Reformat Scala codes
 ```
 
 ### Publishing

project/plugins.sbt

@@ -1,11 +1,11 @@
-addSbtPlugin("com.github.gseitz" % "sbt-release"     % "1.0.6")
+addSbtPlugin("com.github.gseitz" % "sbt-release"     % "1.0.7")
 addSbtPlugin("org.xerial.sbt"    % "sbt-sonatype"    % "2.0")
 addSbtPlugin("com.jsuereth"      % "sbt-pgp"         % "1.1.0")
 addSbtPlugin("com.github.sbt"    % "sbt-findbugs"    % "2.0.0")
 addSbtPlugin("com.github.sbt"    % "sbt-jacoco"      % "3.0.3")
 addSbtPlugin("org.xerial.sbt"    % "sbt-jcheckstyle" % "0.2.0")
 addSbtPlugin("com.typesafe.sbt"  % "sbt-osgi"        % "0.9.2")
-addSbtPlugin("io.get-coursier"   % "sbt-coursier"    % "1.0.0-RC13")
-addSbtPlugin("com.geirsson"      % "sbt-scalafmt"    % "1.3.0")
+addSbtPlugin("io.get-coursier"   % "sbt-coursier"    % "1.0.0")
+addSbtPlugin("com.geirsson"      % "sbt-scalafmt"    % "1.4.0")
 
 scalacOptions ++= Seq("-deprecation", "-feature")