Changes in coq 8.13.2:

• Fix crash when using vm_compute on an irreducible PArray.set
• Fix crash when loading .vo files containing a vm_compute normalized primitive array
• Fix Ltac2.Array.init computational complexity

Changes in ocaml-menhir 20210310:

• Menhir now detects and rejects grammars that have a cycle and grammars that exhibit hidden left recursion. A grammar has a cycle when a nonterminal symbol A expands (in one or more steps) to itself. This implies that the grammar is ambiguous. A grammar has hidden left recursion when a nonterminal symbol A expands (in one step) to B beta, where B expands (in zero or more steps) to nothing and beta expands (in zero or more steps) to A .... This implies that the grammar is not in the class LR(k) for any value of k. Both of these anomalies create a shift/reduce conflict which, if resolved in favor of reduction, leads to a nonterminating parser.
• Disallow the escape sequence \n in a token alias. It was allowed by mistake. Disallowing it ensures that the ## Concrete syntax: comments generated as part of .messages files fit on a single line.
• Internal changes in the expansion of %inline symbols, eliminating certain useless variable renamings that would appear in semantic actions after expansion.
• Internal changes in the code back-end, eliminating certain useless bindings of variables to a unit value.

Changes in ocaml-menhir 20210419:

• Mention the demo coq-minicalc in the manual.
• Parsers generated with the Coq mode now have support for non-certified basic error reporting without an additional parser. This is supported thanks to an extension of the return type parse_result in the coq-menhirlib library and thanks to the new generated helper function Aut.N_of_state. See the new demo coq-syntax-errors and the updated manual for more details. (Contributed by Brian Ward.)

All other builds are simple rebuilds due to the changes above.