Update bsp4j to 2.1.0-M3 (#1444)

Author: lwronski

project/deps.sc

@@ -76,7 +76,7 @@ object Deps {
   def asm      = ivy"org.ow2.asm:asm:9.3"
   // Force using of 2.13 - is there a better way?
   def bloopConfig      = ivy"io.github.alexarchambault.bleep:bloop-config_2.13:1.5.3-sc-1"
-  def bsp4j            = ivy"ch.epfl.scala:bsp4j:2.1.0-M2"
+  def bsp4j            = ivy"ch.epfl.scala:bsp4j:2.1.0-M3"
   def caseApp          = ivy"com.github.alexarchambault:case-app_2.13:2.1.0-M17"
   def collectionCompat = ivy"org.scala-lang.modules::scala-collection-compat:2.8.1"
   // Force using of 2.13 - is there a better way?