* Use 'Pallet' struct in construct_runtime.
* Fix genesis and metadata macro.
* Fix 'Pallet' type alias.
* Replace 'Module' with 'Pallet' for all construct_runtime use cases.
* Replace more deprecated 'Module' struct.
* Bring back AllModules and AllPalletsWithSystem type, but deprecate them.
* Replace deprecated 'Module' struct from merge master.
* Minor fix.
* Fix UI tests.
* Revert UI override in derive_no_bound.
* Fix more deprecated 'Module' use from master branch.
* Fix more deprecated 'Module' use from master branch.
* more clear randomness API for BABE
* babe: move randomness utilities to its own file
* node: use babe::RandomnessFromOneEpochAgo in random_seed implementation
* frame-support: annotate randomness trait with block number
* pallet-randomness-collective-flip: fix for new randomness trait
* pallet-society: fix randomness usage
* pallet-lottery: fix randomness usage
* pallet-contracts: fix randomness usage
* pallet-babe: fix randomness usage
we need to track when the current and previous epoch started so that we
know the block number by each existing on-chain was known
* node: fix random_seed
* node-template: fix random_seed
* frame-support: extend docs
* babe: add test for epoch starting block number tracking
* babe: fix epoch randomness docs
* frame: add todos for dealing with randomness api changes
Co-authored-by: André Silva <andrerfosilva@gmail.com>