Update sp-weights requirement from 4.0.0 to 7.0.0

[dependabot]

Updates the requirements on sp-weights to permit the latest version.

Changelog

Sourced from sp-weights's changelog.

Changelog

The format is based on Keep a Changelog.

Unreleased

2.0.1-> 3.0.0 - Apollo 14

Most notably, this is the first release of the new FRAME (2.0) with its new macro-syntax and some changes in types, and pallet versioning. This release also incorporates the faster and improve version 2.0 of the parity-scale-codec and upgraded dependencies all-around. While the FinalityTracker pallet has been dropped, this release marks the first public appearance of a few new pallets, too;Bounties, Lottery, Tips (extracted from the Treasury-pallet, see #7536) and Merkle-Mountain-Ranges (MMR).

On the client side, the most notable changes are around the keystore, making it async and switching to a different signing model allowing for remote-signing to be implemented; and various changes to improve networking and light-client support, like adding the Grandpa warp sync request-response protocol (#7711).

Contracts: Please note that the contracts pallet is not part of this release. The pallet is not yet ready and will be released separately in the coming weeks. The currently released contracts pallet is not compatible with the new FRAME, thus if you need the contracts pallet, we recommend you wait with the upgrade until it has been released, too.

Upgrade instructions

Not too much has changed on the top and API level for developing Substrate between 2.0 and 3.0. The easiest and quickest path for upgrading is just to take the latest node-template and try applying your changes to it:

1. take a diff between 2.0 and your changes
2. store that diff
3. remove everything, copy over the 3.0 node-template
4. try re-applying your diff, manually, a hunk at a time.

If that doesn't work for you, we are working on an in-depth-guide for all major changes that took place and how you need to adapt your code for it. You can find the upgrade guide under docs/ in the repo, if you have further questions or problem, please feel free to ask in the github discussion board.

Runtime

• contracts: Charge rent for code storage (#7935)
• contracts: Emit event on contract termination (#8014)
• Fix elections-phragmen and proxy issue (#7040)
• Allow validators to block and kick their nominator set. (#7930)
• Decouple Staking and Election - Part1: Support traits (#7908)
• Introduces account existence providers reference counting (#7363)
• contracts: Cap the surcharge reward by the amount of rent that way payed by a contract (#7870)
• Use checked math when calculating storage size (#7885)
• Fix clear prefix check to avoid erasing child trie roots. (#7848)
• contracts: Collect rent for the first block during deployment (#7847)
• contracts: Add configurable per-storage item cost (#7819)
• babe: expose next epoch data (#7829)
• fix : remove _{ } syntax from benchmark macro (#7822)
• Define ss58 prefix inside the runtime (#7810)
• Allow council to slash treasury tip (#7753)
• Don't allow self proxies (#7803)
• add a current_epoch to BabeApi (#7789)
• Add pallet attribute macro to declare pallets (#6877)
• Make it possible to calculate the storage root as often as you want (#7714)
• Issue 7143 | Refactor Treasury Pallet into Bounties, Tips, and Proposals (#7536)
• Participating in Council Governance is Free for First Time Voters and Successful Closing (#7661)

... (truncated)

Commits

• 108d8ee release sp-core 7.0.0 and sp-runtime 7.0.0 (#12599)
• eb1a2a8 Assets Pallet: reintroduce fungibles::Destroy trait (#12708)
• cd30493 seal_reentrant_count returns contract reentrant count (#12695)
• a0ab42a Asset Pallet: Support repeated destroys to safely destroy large assets (#12310)
• c067438 Make public is_passing and ReferendumStatus (#12667)
• 65a8990 [ci] fix buildah for publishing docker (#12703)
• 940a458 Collective: Benchmark with greater MaxProposals (#12454)
• 59da38b [ci] Add DAG for build-rustdoc and check-dependent-project (#12687)
• 3e71d60 New root_testing pallet (#12451)
• e6768a3 Safe TreeRoute constructor (#12691)
• Additional commits viewable in compare view

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[HCastano]

Will bump in #1549.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.