Bug#1087403: rust-tesseract-sys: Upcoming bindgen update

[NoisyCoil]

Source: rust-tesseract-sys
Followup-For: Bug #1087403
X-Debbugs-Cc: noisyc...@tutanota.com
Control: severity -1 serious

bindgen v0.70.1 is now in unstable, raising severity to serious.