ESP32-targz

In this release:

• bugfix (#8) where gzUpdater was crashing (thanks to @scubachristopher for reporting this).
• temporary downgrade of tarGzExpander now using an intermediary file until gzStream->tarStream gets fixed
• error reporting was slightly improved and is now throwing much less false positives.

Added getGzBufferUint8() to make this 4KB stream buffer available outside the library scope, so they're not completely wasted.

This release fixes a bug where the file name wasn't correctly extracted when untarring multiple files.

Bugfixes:

• Untar: was only unpacking the first file
• Crashes and memory leaks: when using free() instead of delete()
• Path truncation: at 32 chars on SPIFFS in Unpack_tar example

Refactor

• Library now properly distributed in .h + .cpp files and has an inclusion guard
• More verbosity for untar
• Directory listing functions differ for ESP8266 and ESP32

Support

• On ESP8266 this library supports the following filesystems SDFS, SPIFFS, LittleFS
• On ESP32 this library supports the following filesystems SD, SD_MMC, SPIFFS