Bump actix-web from 0.6.15 to 0.7.15 in /demo

[dependabot]

Bumps actix-web from 0.6.15 to 0.7.15.

Changelog

Sourced from actix-web's changelog.

[0.7.15] - 2018-12-05

Changed

• ClientConnector::resolver now accepts Into<Recipient> instead of Addr. It enables user to implement own resolver.

• QueryConfig and PathConfig are made public.

• AsyncResult::async is changed to AsyncResult::future as async is reserved keyword in 2018 edition.

Added

• By default, Path extractor now percent decode all characters. This behaviour can be disabled with PathConfig::default().disable_decoding()

[0.7.14] - 2018-11-14

Added

• Add method to configure custom error handler to Query and Path extractors.

• Add method to configure SameSite option in CookieIdentityPolicy.

• By default, Path extractor now percent decode all characters. This behaviour can be disabled with PathConfig::default().disable_decoding()

Fixed

• Fix websockets connection drop if request contains "content-length" header #567

• Fix keep-alive timer reset

• HttpServer now treats streaming bodies the same for HTTP/1.x protocols. #549

• Set nodelay for socket #560

[0.7.13] - 2018-10-14

Fixed

• Fixed rustls support

• HttpServer not sending streamed request body on HTTP/2 requests #544

[0.7.12] - 2018-10-10

... (truncated)

Commits

• ac9fc66 Bump version to 0.7.15
• 0745a1a Remove usage of upcoming keyword async
• b1635bc Update some dependencies (#612)
• 08c7743 Add set_mailbox_capacity() function
• 68c5d6e impl From\<Cow<'static, [u8]>> for Binary (#611)
• c386353 decode reserved characters when extracting path with configuration (#577)
• 9aab382 Allow user to provide addr to custom resolver
• 389cb13 Export PathConfig and QueryConfig
• 6a93178 Complete error helper functions.
• cd9901c prepare release
• Additional commits viewable in compare view

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