use scalafmt as the code formatter, add sbt-updates

Author: yaroot

.scalafmt.conf

@@ -0,0 +1,11 @@
+project.git = true
+
+maxColumn = 120
+docstrings = JavaDoc
+
+align.tokens = ["%", "%%", {code = "=>", owner = "Case"}]
+align.openParenCallSite = false
+align.openParenDefnSite = false
+continuationIndent.callSite = 2
+continuationIndent.defnSite = 2
+danglingParentheses = true

project/plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("org.scalariform"     % "sbt-scalariform"      % "1.8.2")
+addSbtPlugin("com.geirsson"        % "sbt-scalafmt"         % "1.5.0")
 addSbtPlugin("net.virtual-void"    % "sbt-dependency-graph" % "0.9.0")
-addSbtPlugin("com.timushev.sbt"    % "sbt-updates"          % "0.3.3")
-addSbtPlugin("io.github.gitbucket" % "sbt-gitbucket-plugin" % "1.2.0")
+addSbtPlugin("com.timushev.sbt"    % "sbt-updates"          % "0.3.4")
+addSbtPlugin("io.github.gitbucket" % "sbt-gitbucket-plugin" % "1.2.0")