* update for rc5

* update for rc5

* remove system

* fix format

* fix format

* Update lib.rs

fix format build failed

Co-authored-by: zjb0807 <zjb0807@qq.com>

* fmt: wrap comments.

* Github actions: use nightly toolchain.

* Make file: does not enforce stable fmt.

* merge orml-price into orml-traits

* fix tokens

* format

* remove prices

* add unit tests for schedule update

* use WEIGHT_PER_MICROS in weight calculation

* remove LinkedMap and FixedU128 implemention

* bump version

* Remove clippy workaround for decl_module.

* Fix typo.

* impl OnReceived for tokens

* update storage map keys of tokens

* remove ExistentialDeposit

* switch subsrate dependencies to crates.io

* bump version

* update license

* Configure CI to run clippy

* Fix up clippy issues in vesting

* Fix up clippy issues in utilities

* Fix up clippy issues in tokens

* Fix up clippy issues in schedule-update

* Fix up clippy issues in oracle

* Fix up clippy issues in gradually-update

* Fix up clippy issues in currencies

* Fix up clippy issues in auction

* Fix formatting

* Deny warnings when running clippy on CI

* Fix clippy issues in benchmarking

* Add descriptions to all cargo subprojects

* Add repository field to all cargo subprojects

* Modify GitHub actions to run cargo unleash

* Add license-file field to all cargo subprojects

* Remove pallet-balances/std feature from std feature of schedule-update

* Add version numbers to path dependencies

* Fix compilation errors on all cargo subprojects

* Attempt to force use one version of the compiler

* Put cargo unleash step at the very end

* Fix all test compile errors

* Use drain_prefix instead of drain

* fix tests

Co-authored-by: Bryan Chen <xlchen1291@gmail.com>

* Renaming substrate deps to their package names.

* Combine imports.

* Upgrade substrate to alpha 5.

* Upgrade serde & codec.

* add constructor for CheckOperator

* refactor the traits related to Currency

* format code

* modify

* update test cases

* update test cases

* Add tokens module documentations.

* Add currencies module documentations.

* Add installation documentations.

* update to pre-release version

* update nightly version

* fix build issue

Co-authored-by: Xiliang Chen <xlchen1291@gmail.com>

* update substrate

* fix tests

* Add dust removal and transfer_all in orml-tokens.

* Ensure existential rule for transfer, deposit and withdraw.

* orml-tokens transfer: return error if dest balance is zero and transfer amount below existential deposit.

* set_balance helper.

* Existential deposit unit tests.

* Fix orml-currencies mock.

* Renaming.

* Update transfer_all in orml-tokens.