Bump NRefactory to:

KirillOsenkov · KirillOsenkov · commit c7bc4745cf95 · 2019-02-06T17:22:07.000-08:00
KirillOsenkov/NRefactory@c2c07ca This is needed to move Cecil to PackageReference.
diff --git a/.gitmodules b/.gitmodules
@@ -32,7 +32,7 @@
 	url = git://github.com/mono/mono-tools.git
 [submodule "main/external/nrefactory"]
 	path = main/external/nrefactory
-	url = git://github.com/icsharpcode/NRefactory.git
+	url = git://github.com/KirillOsenkov/NRefactory.git
 [submodule "main/external/nuget-binary"]
 	path = main/external/nuget-binary
 	url = git://github.com/mono/nuget-binary.git
diff --git a/main/external/nrefactory b/main/external/nrefactory
@@ -1 +1 @@
-Subproject commit 0607a4ad96ebdd16817e47dcae85b1cfcb5b5bf5
+Subproject commit c2c07caa9775e8d67d77c2b71aaa3859080758f4
