Add support for the latest devices, refresh dependencies list, and update Help and Version.

[DanTheMann15]

This PR includes 4 major proposed changes, and the full notes are here:

• Adds support for the newest devices, including:

  • Apple Watch SE
  • Apple Watch Series 6
  • iPad (8th generation)
  • iPad Air (4th generation)
  • iPhone 12 mini
  • iPhone 12
  • iPhone 12 Pro
  • iPhone 12 Pro Max
    

• Supports HomePods, Apple Silicon Macs and the T2 Coprocessor (iBridge):

  • HomePod
  • HomePod mini
  • Developer Transition Kit
  • MacBook Air (M1, 2020)
  • MacBook Pro (13-inch, M1, 2020)
  • Mac mini (M1, 2020)
  • T2 Coprocessor devices (iBridge2,1 through iBridge2,22)
    

• Updates Help and Version:

  • The version of tsschecker is now shown as "TSSCHECKER_VERSION_COUNT".0-"TSSCHECKER_VERSION_SHA"
    to match the versioning style as img4tool and libfragmentzip
  • the main help page in tsschecker has been updated to fix a few typos, update the sample usage a bit
    and also mention the apnonce requirement for A12/S4 and newer
    

• Refresh dependencies list and add buildsystem.

  • makes the dependencies list in readme.md look like that found in img4tool,
    so that it gives people a better idea on what they need to build tsschecker.
  • lists more needed dependencies, especially for building libfragmentzip since it's dependencies aren't listed.
    

• Other Changes and fixes:

  • (tsschecker.c) Organize the device list, making descriptions easier to read
  • (tsschecker.c) Fix incorrect bbgcid for the iPad 7th generation (iPad7,12)
  • (tsschecker.c) Add Mav20 bbgcid's for iPhone 12 model series.
  • (tsschecker.c) Fix Watch1 Noncelength, as the device is non-KTRR.
  • (tsschecker.c) Remove the broken download progressbar.
  • (tss.c) fix logical bug in tss_request_add_ap_tags() when selecting 'only firmware components'
  • (tss.c) remove trailing whitespace error from tss.c
  • (tss.c) update the tss client version string.
  • (configure.ac) properly detect OS for custom conditional settings.
  • (tsschecker/makefile.am) build static app on windows properly linked against libwinpthread.
  • (Readme.md) Update Help to match what's been changed in the program itself.
  • Update Jssy submodule
    it's a pretty long list of fixes and changes but you get the idea, feel free to squash and merge if it's appropriate,
    just be sure to list each of these changes while doing so, that way people will know what's changed, thanks!

[DanTheMann15]

PR Updated, iPhone 12 support added along with the respective Baseband CertID's

[DanTheMann15]

PR Updated, HomePod and Apple Silicon Mac support added.

[DanTheMann15]

another PR Update, the documentation and the jssy submodule is updated, along with full support for the T2 Coprocessor (iBridge) firmwares.