Merge #342

342: Bump parking_lot from 0.6.4 to 0.7.0 r=matklad a=dependabot[bot]

Bumps [parking_lot](https://github.com/Amanieu/parking_lot) from 0.6.4 to 0.7.0.
<details>
<summary>Changelog</summary>

*Sourced from [parking_lot's changelog](https://github.com/Amanieu/parking_lot/blob/master/CHANGELOG.md).*

> 0.7.0 (2018-11-20)
> ==================
> 
> - Return if or how many threads were notified from `Condvar::notify_*`
> 
> 0.6.3 (2018-07-18)
> ==================
> 
> - Export `RawMutex`, `RawRwLock` and `RawThreadId`.
> 
> 0.6.2 (2018-06-18)
> ==================
> 
> - Enable `lock_api/nightly` feature from `parking_lot/nightly` ([#79](https://github-redirect.dependabot.com/Amanieu/parking_lot/issues/79))
> 
> 0.6.1 (2018-06-08)
> ==================
> 
> Added missing typedefs for mapped lock guards:
> 
> - `MappedMutexGuard`
> - `MappedReentrantMutexGuard`
> - `MappedRwLockReadGuard`
> - `MappedRwLockWriteGuard`
> 
> 0.6.0 (2018-06-08)
> ==================
> 
> This release moves most of the code for type-safe `Mutex` and `RwLock` types
> into a separate crate called `lock_api`. This new crate is compatible with
> `no_std` and provides `Mutex` and `RwLock` type-safe wrapper types from a
> raw mutex type which implements the `RawMutex` or `RawRwLock` trait. The API
> provided by the wrapper types can be extended by implementing more traits on the
> raw mutex type which provide more functionality (e.g. `RawMutexTimed`). See the
> crate documentation for more details.
> 
> There are also several major changes:
> 
> - The minimum required Rust version is bumped to 1.26.
> - All methods on `MutexGuard` (and other guard types) are no longer inherent
>   methods and must be called as `MutexGuard::method(self)`. This avoids
>   conflicts with methods from the inner type.
> - `MutexGuard` (and other guard types) add the `unlocked` method which
>   temporarily unlocks a mutex, runs the given closure, and then re-locks the
>    mutex.
> - `MutexGuard` (and other guard types) add the `bump` method which gives a
>   chance for other threads to acquire the mutex by temporarily unlocking it and
>   re-locking it. However this is optimized for the common case where there are
>   no threads waiting on the lock, in which case no unlocking is performed.
> - `MutexGuard` (and other guard types) add the `map` method which returns a
></table> ... (truncated)
</details>
<details>
<summary>Commits</summary>

- See full diff in [compare view](https://github.com/Amanieu/parking_lot/commits)
</details>
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[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=parking_lot&package-manager=cargo&previous-version=0.6.4&new-version=0.7.0)](https://dependabot.com/compatibility-score.html?dependency-name=parking_lot&package-manager=cargo&previous-version=0.6.4&new-version=0.7.0)

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[//]: # (dependabot-automerge-end)

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</details>

Co-authored-by: dependabot[bot] <[email protected]>

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