* Fix invalid V with metamask/ledger

* DONT FORGET TO REVERT BEFORE MERGING: test deployment

* DONT FORGET TO REVERT BEFORE MERGING 2: test deployment

* Revert "DONT FORGET TO REVERT BEFORE MERGING 2: test deployment"

This reverts commit 8331f2a.

* Revert "DONT FORGET TO REVERT BEFORE MERGING: test deployment"

This reverts commit 03b81e3.

* cache every used provider, not only injected one

* package json update

* refactor: Set success status to `201` (CREATED)

* refactor: return `null` when there's no latestTx

* feature: action/reducer to UPDATE_SAFE_NONCE

* refactor: when processing txs returned from backend, extract latest tx nonce value and store it in the safe's state

* chore: update `yarn.lock`

* refactor: `UPDATE_SAFE_THRESHOLD` and `UPDATE_SAFE_NONCE` discarded in favor of `UPDATE_SAFE`

* refactor: use `SAFE_REDUCER_ID` constant

* refactor: remove `updateSafeNonce` file

* fix: change the order of the upgrade methods lookup

The `isUpgradeTransaction` method was looking for the methods in an wrong order (#599).
The proper order was set in #610, but `isUpgradeTransaction` wasn't updated.

* fix: contract upgrade version lookup

…742)

* Use eth_sign for hardware wallets

* install onboard.js with fix from forked repo

* rebuild yarn.lock to fix cached onboard

* update bnc-onboard

…opment

* fix: Display new threshold value when changing its value

There was a typo for the `changeThreshold` action

fixes #746

* refactor: use a constant for safe methods names

Previously we were looking for `decimals` hash in the contract `code`.
There are some contracts like USDC who happen to be behind a FiatTokenProxy, making it upgradable.
By directly calling the `decimals()` method, we interact with the contract and can be sure that the `decimals()` method is present.

fixes #678

* don't use getLastTxNonce to fetch safe nonce

* fetch safe nonce in checkAndUpdateSafe

* checkAndUpdateSafe refactor

* remove nonce update logic from UPDATE_SAFE reducer

* handle the case when localSafe returns undefined

* handle the case when localSafe returns undefined in buildTransactionFrom

* bump package json version to 1.9.4