Coinduction 1.22, for Rocq 9.2

• composition symbol (°) at level 40 to match other libs
• removed warnings and deprecated symbols for rocq 9.2
• formatting for `R notation
• helpers for PreOrder, Equivalence, Proper1, Proper2

this version needs rocq 9.2 ;
in case notation changes cause problems, coinduction.1.22 also compiles with rocq 9.2

Coinduction 1.21, for Rocq 9.0

move from Coq to Rocq, transition packages no longer required

Coinduction 1.20, for Coq 8.20

compatibility release

Coinduction 1.9

• compatibility with Coq 8.19
• linking the companion to the tower as defined in [tower.v]
• monotonicity of [gfp] and related lemmas for the chain and the companion

Coinduction 1.8

Better hint mode for typeclass CompleteLattice

Coinduction 1.7, tower-based, for Coq 8.16 and 8.17

• tower-based reimplementation of the tactic
  not backward compatible, but required changes should only result in simplifications
  (see changes in package coq-coinduction-examples)
  lemmas and definition related to the companion are kept in [companion.v]
• library should be loaded with [From Coinduction Require Import all].
• fixed efficiency issues with large arities
• compatible with both Coq 8.16 and 8.17

Coinduction 1.6, for Coq 8.16

compatibility with Coq 8.16

Coinduction 1.5, for Coq 8.15

compatibility with Coq 8.15

Coinduction 1.4, for Coq 8.14

• add support for heterogeneous relations of arbitrary arity
• only for coq 8.14 (lost compatibility with 8.13), release for 8.15 to arrive shortly

Coinduction 1.3, for Coq 8.13

Fix issue with slow unification problems occurring during typeclass resolution.