fix static analysis errors

Author: lukaszsamson

.dialyzer_ignore.exs

@@ -1,4 +1,5 @@
 [
+  {"lib/launch.ex", :unknown_function},
   {"lib/language_server/providers/execute_command/restart.ex", :no_return},
   {"lib/language_server/experimental/protocol/proto.ex", :no_return}
 ]

apps/language_server/lib/language_server/cli.ex

@@ -28,7 +28,7 @@ defmodule ElixirLS.LanguageServer.CLI do
     start_language_server()
 
     Logger.info("Started ElixirLS v#{Launch.language_server_version()}")
-    
+
     Logger.info("Running in #{File.cwd!()}")
 
     versions = Launch.get_versions()

mix.exs

@@ -11,7 +11,7 @@ defmodule ElixirLS.Mixfile do
       deps: deps(),
       elixir: ">= 1.12.0",
       dialyzer: [
-        plt_add_apps: [:dialyxir_vendored, :debugger, :dialyzer, :ex_unit],
+        plt_add_apps: [:dialyxir_vendored, :debugger, :dialyzer, :ex_unit, :hex],
         flags: [
           # enable only to verify error handling
           # :unmatched_returns,