Update server to 1.37.15

Author: rwols

plugin.py

@@ -13,7 +13,7 @@
 from LSP.plugin.core.views import range_to_region  # TODO: not public API :(
 import sublime
 
-VERSION = "1.37.14"
+VERSION = "1.37.15"
 URL = "https://github.com/OmniSharp/omnisharp-roslyn/releases/download/v{}/omnisharp-{}.zip"  # noqa: E501