Update painlessMeshSTA.cpp, fix a couple of caps and spelling errors

See merge request painlessMesh/painlessMesh!80

Bug fixes:

- Compilation on newest ESP32

New features:

- Experimental support for ArduinoJson version 6

Misc.:

- CI pipeline improvements

Updating ArduinoJson API to newest version

createObject is deprecated

Use serializeJson instead of printTo

RawJson is deprecated in arduinojson v6

Newest version does not use rvalues

Small edit

Use str instead of buffer

Replace deprecated get notation ArduinoJson

Use json long long support for proper uint32 handling

Fixed painlessMeshConnection.cpp for compatibility with the current ESP-IDF

See merge request painlessMesh/painlessMesh!78

Fix in hidden mesh support

Hidden ssid fix

ESP32 scanComplete returns int16_t

Various bug fixes

- [ESP32] STA connection
- Compile namedMesh on Arduino
- [ESP32] Granular onEvent handling

Fixes #164

Fixes #163

Bug fixes

commit 417d2de1c00dd660635449ab2b0f6d4259ec1586
Author: BlackEdder <edder@tkwsping.nl>
Date:   Sun Jun 17 10:14:36 2018 +0100

    Use sentBufferTask to send messages

    Fixes #155

    There was a problem if onAck got called, while painlessMesh has not
    finished processing the previous one yet.

Fixes #153

Update version

This patch fixes #95

Update version

This patch fixes #95

Connect by bssid

Stability improvement

Squashed commit of the following:

commit 483ce386268bffa3f6849ea94b0985c8823cff43
Author: BlackEdder <edder@tkwsping.nl>
Date:   Fri Jun 1 23:34:02 2018 +0100

    Update version number

commit 936b4627778c4a72bbc63c019a1e3f7a3c794627
Author: BlackEdder <edder@tkwsping.nl>
Date:   Fri Jun 1 22:28:17 2018 +0100

    Fix for event.ssid is not available

Add root node support