Bump version to 1.7

Bump version to v1.6.2

Fix bug in '.push_file()'

This commit fix very rare bug with incorrect MD5
calculation on a Telegram side for small files.

Now OpenPretender() class have '.get_expected_size()'
method, so we can correctly report file size on
upload to the underlying Telethon library.

Update version to 1.6

Lock 'cryptography' library (<43.0.0) +

v43.0.0 break some code in TGBOX. Will be
used 43+ in `tgbox` v1.6

+ Bump version to v1.5.1

Update version to 1.5

Update API_ID & API_HASH in 'replace_session()'

Fix duplication bug in PATH_PARS

Bump library version to 1.4

Change version to v1.4.0b1