atbash-cipher: update to canonical data v1.2.0
Version 1.2.0 adds two tests: "decode with too many spaces" and "decode
with no spaces".
The test "test_encode_ignores_non_ascii" was removed in
exercism/problem-specifications#529, but no version change was included.
Relevant PRs:
- 1.1.0 -> 1.2.0:
- no version:
[package]
edition = "2018"
name = "atbash-cipher"
-version = "1.1.0"
+version = "1.2.0"
