Documentation test is broken since quoted_printable 0.4.7

[link2xt]

If I use quoted_printable = "=0.4.6" in Cargo.toml, all tests pass.

If I set quoted_printable = "=0.4.7" in Cargo.toml, one of the doc tests fails:

---- src/lib.rs - parse_mail (line 906) stdout ----
Test executable failed (exit status: 101).

stderr:
thread 'main' panicked at src/lib.rs:28:5:
assertion `left == right` failed
  left: "This is the plaintext version, in utf-8. Proof by Euro: €\r\n"
 right: "This is the plaintext version, in utf-8. Proof by Euro: €"
stack backtrace:
...

This is broken by the change staktrace/quoted-printable#16 it seems.

[staktrace]

When I check out the master branch of mailparse, it has quoted-printable at version 0.4.8 and cargo tests --all and cargo test --doc both pass. What am I missing? And why does your PR use 0.4.6 as the base version that's being updated?

[staktrace]

Oh I see. I think you're using the latest tagged version rather than the master branch. This issue is a dup of #119 and has already been fixed. Maybe you just need me to tag a new release of mailparse?

[link2xt]

Well, actually I want to update quoted_printable to 0.5.0 without duplicate dependencies: #123

[staktrace]

I publised v0.14.1 of mailparse with the updated quoted-printable dependency.