Update chrome, add process lock

Adds a lock around the process.

Updates to latest chrome

Update to chrome version 84.0.4147.105

Fix wsconn loop for real

Merge pull request #38 from wirepair/investigate_wsconn_loop

Fix wsconn loop

Fixes not closing wsconn if io/timeout occurred

This allows context.Canceled to not forcibly close the wsconn and cause the api to no longer be able to send messages to chrome.

Small fix

return ChromeCtxDoneErr if ctx.Done.

Fix for go modules

Moved v2 into the v2 directory because modules are dumb.

Switch gcdapi to using context.Context

To allow finer control over timing out/canceling gcdapi requests, a context object is now required to be passed to all API calls.

Set higher ws connection write size

Fixes intercepting large messages or sending various large messages over devtools

Replace timer with After

Merge pull request #34 from wirepair/fix_timeouts

remove timers in favor of After

Fixed send timeout bug

Fixed a bug in SendCustomReturn where it wasn't returning an error, causing a possible dead lock.
Bumped chrome protocol to 83.0.4103.116