Add sysexits exit code

Doesn't capture input or I/O errors. Not bothering to return EX_NOINPUT
or EX_IOERR or EX_CANTCREAT because I don't want to bother creating an
error enum and variants for each case.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 91ced45..5e06e7e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,5 +5,6 @@ edition = "2018"
 
 [dependencies]
 anyhow = "1.0.40"
+exitcode = "1.1.2"
 getopts = "0.2.21"
 lopdf = "0.26.0"