Add additional sysexits error codes for other errors

Give types to the errors in `run()` and exit with appropriate error
codes.

Split out an additional error type so we can wrap errors from the
non-main functions.

Remove 'anyhow', replacing it with 'thiserror' now that we're using
error types.

1 files changed, 0 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 439c05f..ba30916 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.0.1"
 edition = "2018"
 
 [dependencies]
-anyhow = "1.0.38"
 exitcode = "1.1.2"
 mailparse = "0.13.2"
 thiserror = "1.0.24"