chore: configure dialyzer plt paths (#183)

Author: dvic

.gitignore

@@ -25,3 +25,7 @@ next_ls-*.tar
 # Temporary files, for example, from tests.
 /tmp/
 burrito_out
+
+# Ignore dialyzer plt files
+/priv/plts/*.plt
+/priv/plts/*.plt.hash

mix.exs

@@ -19,7 +19,11 @@ defmodule NextLS.MixProject do
         main: "README",
         extras: ["README.md"]
       ],
-      dialyzer: [ignore_warnings: ".dialyzer_ignore.exs"]
+      dialyzer: [
+        plt_core_path: "priv/plts",
+        plt_local_path: "priv/plts",
+        ignore_warnings: ".dialyzer_ignore.exs"
+      ]
     ]
   end