Bump okhttp from 3.2.0 to 4.2.2

[dependabot-preview]

Bumps okhttp from 3.2.0 to 4.2.2.

Changelog

Sourced from okhttp's changelog.

OkHttp 3.x Change Log

Version 3.14.4

2019-09-29

• Fix: Cancel calls that fail due to unexpected exceptions. We had a bug where an enqueued call
  would never call back if it crashed with an unchecked throwable, such as a
  NullPointerException or OutOfMemoryError. We now call Callback.onFailure() with an
  IOException that reports the call as canceled. The triggering exception is still delivered to
  the thread's UncaughtExceptionHandler.
• Fix: Don't evict incomplete entries when iterating the cache. We had a bug where iterating
  Cache.urls() would prevent in-flight entries from being written.

Version 3.14.3

2019-09-10

• Fix: Don't lose HTTP/2 flow control bytes when incoming data races with a stream close. If this
  happened enough then eventually the connection would stall.

• Fix: Acknowledge and apply inbound HTTP/2 settings atomically. Previously we had a race where we
  could use new flow control capacity before acknowledging it, causing strict HTTP/2 servers to
  fail the call.

• Fix: Recover gracefully when a coalesced connection immediately goes unhealthy.

Version 3.14.2

2019-05-19

• Fix: Lock in a route when recovering from an HTTP/2 connection error. We had a bug where two
  calls that failed at the same time could cause OkHttp to crash with a NoSuchElementException
  instead of the expected IOException.

• Fix: Don't crash with a NullPointerException when formatting an error message describing a
  truncated response from an HTTPS proxy.

Version 3.14.1

2019-04-10

• Fix: Don't crash when an interceptor retries when there are no more routes. This was an
  edge-case regression introduced with the events cleanup in 3.14.0.

• Fix: Provide actionable advice when the exchange is non-null. Prior to 3.14, OkHttp would
  silently leak connections when an interceptor retries without closing the response body. With

... (truncated)

Commits

• d02340f Prepare for release 4.2.2.
• b897fb8 Merge pull request #5537 from square/jwilson.1006.cancel_close
• 10f9227 If RST STREAM and END OF STREAM race, send RST STREAM (4.2.x branch)
• 97d25e8 Prepare next development version.
• 57a165b Prepare for release 4.2.1.
• 4c640ad Merge pull request #5524 from square/jwilson.1002.cherrypick_poolfix
• 1b4b6bb Fix connection pooling for different clients with the same pool.
• 582f8ef Prepare for release 4.2.0.
• 9b60ca8 Merge pull request #5434 from square/jwilson.0909.race
• 510475a Don't leak incoming bytes when we race incoming data and close
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #76.