Migrate to KiCAD-5

tools/merge_libs

@@ -97,7 +97,7 @@ class Lib:
 
     def commit(self):
         with open(self.path, 'w') as f:
-            f.write('EESchema-LIBRARY Version 2.3\n')
+            f.write('EESchema-LIBRARY Version 2.4\n')
             f.write('#encoding utf-8\n')
             for c in sorted(self.component):
                 f.write(''.join(self.component[c]))