chore(deps): update dependency com.squareup.okhttp3:okhttp to v4.4.0

[renovate]

This PR contains the following updates:

Package	Update	Change
com.squareup.okhttp3:okhttp (source)	minor	4.3.1 -> 4.4.0

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Release Notes

square/okhttp

v4.4.0

2020-02-17

• New: Support canceled() as an event that can be observed by EventListener. This should be
  useful for splitting out canceled calls in metrics.

• New: Publish a [bill of materials (BOM)][bom] for OkHttp. Depend on this from Gradle or Maven to
  keep all of your OkHttp artifacts on the same version, even if they're declared via transitive
  dependencies. You can even omit versions when declaring other OkHttp dependencies.

  dependencies {
     api(platform("com.squareup.okhttp3:okhttp-bom:4.4.0"))
     api("com.squareup.okhttp3:okhttp")              // No version!
     api("com.squareup.okhttp3:logging-interceptor") // No version!
  }

• New: Upgrade to Okio 2.4.3.

  implementation("com.squareup.okio:okio:2.4.3")

• Fix: Limit retry attempts for HTTP/2 REFUSED_STREAM and CANCEL failures.

• Fix: Retry automatically when incorrectly sharing a connection among multiple hostnames. OkHttp
  shares connections when hosts share both IP addresses and certificates, such as squareup.com
  and www.squareup.com. If a server refuses such sharing it will return HTTP 421 and OkHttp will
  automatically retry on an unshared connection.

• Fix: Don't crash if a TLS tunnel's response body is truncated.

• Fix: Don't track unusable routes beyond their usefulness. We had a bug where we could track
  certain bad routes indefinitely; now we only track the ones that could be necessary.

• Fix: Defer proxy selection until a proxy is required. This saves calls to ProxySelector on
  calls that use a pooled connection.

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