Update dependency com.squareup.okhttp3:okhttp to v4.2.2

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.squareup.okhttp3:okhttp (source)	minor	4.0.1 -> 4.2.2

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Release Notes

square/okhttp

v4.2.2

2019-10-06

• Fix: When closing a canceled HTTP/2 stream, don't send the END_STREAM flag. This could cause
  the server to incorrectly interpret the stream as having completed normally. This is most useful
  when a request body needs to cancel its own call.

v4.2.1

2019-10-02

• Fix: In 4.1.0 we introduced a performance regression that prevented connections from being
  pooled in certain situations. We have good test coverage for connection pooling but we missed
  this because it only occurs if you have proxy configured and you share a connection pool among
  multiple OkHttpClient instances.

  This particularly-subtle bug was caused by us assigning each OkHttpClient instance its own
  NullProxySelector when an explicit proxy is configured. But we don't share connections when
  the proxy selectors are different. Ugh!

v4.2.0

2019-09-10

• New: API to decode a certificate and private key to create a HeldCertificate. This accepts a
  string containing both a certificate and PKCS #​8-encoded private key.

  val heldCertificate = HeldCertificate.decode("""
      |-----BEGIN CERTIFICATE-----
      |MIIBYTCCAQegAwIBAgIBKjAKBggqhkjOPQQDAjApMRQwEgYDVQQLEwtlbmdpbmVl
      |cmluZzERMA8GA1UEAxMIY2FzaC5hcHAwHhcNNzAwMTAxMDAwMDA1WhcNNzAwMTAx
      |MDAwMDEwWjApMRQwEgYDVQQLEwtlbmdpbmVlcmluZzERMA8GA1UEAxMIY2FzaC5h
      |cHAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASda8ChkQXxGELnrV/oBnIAx3dD
      |ocUOJfdz4pOJTP6dVQB9U3UBiW5uSX/MoOD0LL5zG3bVyL3Y6pDwKuYvfLNhoyAw
      |HjAcBgNVHREBAf8EEjAQhwQBAQEBgghjYXNoLmFwcDAKBggqhkjOPQQDAgNIADBF
      |AiAyHHg1N6YDDQiY920+cnI5XSZwEGhAtb9PYWO8bLmkcQIhAI2CfEZf3V/obmdT
      |yyaoEufLKVXhrTQhRfodTeigi4RX
      |-----END CERTIFICATE-----
      |-----BEGIN PRIVATE KEY-----
      |MEECAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQcEJzAlAgEBBCA7ODT0xhGSNn4ESj6J
      |lu/GJQZoU9lDrCPeUcQ28tzOWw==
      |-----END PRIVATE KEY-----
      """.trimMargin())
  val handshakeCertificates = HandshakeCertificates.Builder()
      .heldCertificate(heldCertificate)
      .build()
  val server = MockWebServer()
  server.useHttps(handshakeCertificates.sslSocketFactory(), false)

  Get these strings with HeldCertificate.certificatePem() and privateKeyPkcs8Pem().

• Fix: Handshake now returns peer certificates in canonical order: each certificate is signed by
  the certificate that follows and the last certificate is signed by a trusted root.

• 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.

v4.1.1

2019-09-05

• Fix: Don't drop repeated headers when validating cached responses. In our Kotlin upgrade we
  introduced a regression where we iterated the number of unique header names rather than then
  number of unique headers. If you're using OkHttp's response cache this may impact you.

v4.1.0

2019-08-12

• OkHttp's new okhttp-brotli module implements Brotli compression. Install the interceptor to
  enable Brotli compression, which compresses 5-20% smaller than gzip.

  val client = OkHttpClient.Builder()
      .addInterceptor(BrotliInterceptor)
      .build()
  

  This artifact has a dependency on Google's Brotli decoder (95 KiB).

• New: EventListener.proxySelectStart(), proxySelectEnd() events give visibility into the
  proxy selection process.

• New: Response.byteString() reads the entire response into memory as a byte string.

• New: OkHttpClient.x509TrustManager accessor.

• New: Permit [new WebSocket response codes][iana_websocket]: 1012 (Service Restart), 1013 (Try
  Again Later), and 1014 (invalid response from the upstream).

• New: Build with Kotlin 1.3.41, BouncyCastle 1.62, and Conscrypt 2.2.1.

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

• Fix: Defer the SecurityException when looking up the default proxy selector.

• Fix: Don't use brackets formatting IPv6 host names in MockWebServer.

• Fix: Don't permit cache iterators to remove entries that are being written.

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