Changes for TlsContextOptions

• Backwards Incompatible API Change: verify_peer in TlsContextOptions now defaults to true instead of false.
• WebsocketConfig now has an optional member (tls_ctx_options) for specifying TlsContextOptions.

Extend proxy support

• Adds support for establishing mqtt connections directly through an http proxy

ECS provider fixes + audit

• addresses multiple issues with the ECS credentials provider
• package update

More validation of HTTP/1.1 messages

• BUGFIX: Fix several MQTT race conditions.
• BUGFIX: More validation of HTTP/1.1 messages.
• BUGFIX: High resolution clock fix on Windows.
• BUGFIX: Non-ascii file open fix on Windows.
• BUGFIX: Support non-desktop Windows.
• BUGFIX: Fixing sending of S3 abort-multipart-upload message

Dependency pinning rework

• Altered how we were pinning the dependency so that downstream consumers look secure as well.

Dependency updates

• Pinned some dependencies

Submodules update

• Updated the underlying aws-lc to solve the compiling issue

Proxy option binding bug fix

• Fixed a bug that the authentication doesn't propagate correctly as proxy option.

Protocol Operation Timeout Added

• Deprecated with_timeout_ms method as it's out of date. The with_timeout_ms will be moved to with_ping_timeout_ms to configures the PINGREQ response timeout
• Add new with_protocol_operation_timeout_ms to configure the protocol operation timeout. Milliseconds to wait for the response to the operation requires response by protocol on a healthy connection.

Fix process exit and aws-lc integration

• Node process exit bug fix (#191)
• Integration with aws-lc for crypto (#189)