Update tokio-timer requirement from 0.1.1 to 0.2.10

[dependabot-preview]

Updates the requirements on tokio-timer to permit the latest version.

Changelog

Sourced from tokio-timer's changelog.

This changelog only applies to the tokio crate proper. Each sub crate
maintains its own changelog tracking changes made in each respective sub crate.

0.1.15 (January 24, 2019)

Added

• Re-export tokio-sync APIs (#839).
• Stream enumerate combinator (#832).

0.1.14 (January 6, 2019)

• Use feature flags to break up the crate, allowing users to pick & choose
  components (#808).
• Export UnixDatagram and UnixDatagramFramed (#772).

0.1.13 (November 21, 2018)

• Fix Runtime::reactor() when no tasks are spawned (#721).
• runtime::Builder no longer uses deprecated methods (#749).
• Provide after_start and before_stop configuration settings for
  Runtime (#756).
• Implement throttle stream combinator (#736).

0.1.12 (October 23, 2018)

• runtime: expose keep_alive on runtime builder (#676).
• runtime: create a reactor per worker thread (#660).
• codec: fix panic in LengthDelimitedCodec (#682).
• io: re-export tokio_io::io::read function (#689).
• runtime: check for executor re-entry in more places (#708).

0.1.11 (September 28, 2018)

• Fix tokio-async-await dependency (#675).

0.1.10 (September 27, 2018)

• Fix minimal versions

0.1.9 (September 27, 2018)

• Experimental async/await improvements (#661).
• Re-export TaskExecutor from tokio-current-thread (#652).
• Improve Runtime builder API (#645).
• tokio::run panics when called from the context of an executor
  (#646).
• Introduce StreamExt with a timeout helper (#573).
• Move length_delimited into tokio (#575).
• Re-organize tokio::net module (#548).
• Re-export tokio-current-thread::spawn in current_thread runtime

... (truncated)

Commits

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[dependabot-preview]

Superseded by #30.