`pass init` ignores $PASSWORD_STORE_DIR

[Thomas Koch]

Repro:

export PASSWORD_STORE_DIR=~/.local/share/password-store
test ! -e $PASSWORD_STORE_DIR
pass init REDACTED

prints:

mkdir: created directory '/home/REDACTED/.password-store/'
Password store initialized for REDACTED

expected:

Init password-store at $PASSWORD_STORE_DIR.

Thank you!