Nim: Schedule a project rescan when new files are added or removed

Change-Id: I2b5a769e0d5e77ce2dd72e0637c0cbcd8f14875e
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/nim/project/nimproject.h

@@ -52,9 +52,9 @@ public:
     bool needsConfiguration() const override;
     bool supportsKit(ProjectExplorer::Kit *k, QString *errorMessage) const override;
     Utils::FileNameList nimFiles() const;
+    void scheduleProjectScan();
 
 private:
-    void scheduleProjectScan();
     void collectProjectFiles();
     void updateProject();