#1708: fix die() exit code guarantee under set -e

[VasilevNStas]

Closes #1708

Fix die() exit code guarantee under set -e. When set -e is active and the echo to stderr fails, the shell exits immediately before reaching exit 1. Adding || true ensures the function always reaches exit 1.

[VasilevNStas]

@yegor256 plz review

[yegor256]

@VasilevNStas looks like a mix of two changes in one PR

[VasilevNStas]

@yegor256

Fixed — separated the FakeOctokit patch into its own PR (included in #1786). This PR now only has the die() fix.