Add BC promise rules for constructors

Author: alexandre-daubois

contributing/code/bc.rst

@@ -258,6 +258,14 @@ Make public or protected                                                  Yes
 Remove private property                                                   Yes
 **Constructors**
 Add constructor without mandatory arguments                               Yes             :ref:`[1] <note-1>`
+:ref:`Add argument without a default value <add-argument-public-method>`  No
+Add argument with a default value                                         Yes
+Remove argument                                                           No              :ref:`[3] <note-3>`
+Add default value to an argument                                          Yes
+Remove default value of an argument                                       No
+Add type hint to an argument                                              No
+Remove type hint of an argument                                           No
+Change argument type                                                      No
 Remove constructor                                                        No
 Reduce visibility of a public constructor                                 No
 Reduce visibility of a protected constructor                              No              :ref:`[7] <note-7>`