Cannot build in latest nightly due to possible compiler change influencing maud_macros

[thePalindrome]

Compiling on the latest nightly (1.28.0) results in a failure to compile, stating this:

/target/debug/deps/libmaud_macros-47a7b704f937589f.so: undefined symbol: __rustc_plugin_registrar_83d325d51709f388a4d3c187f8e5cca5__
 --> src/main.rs:2:11
  |
2 | #![plugin(maud_macros)]
  |           ^^^^^^^^^^^

Information from lambda-fairy/maud#119 suggests it may be a compiler change.

[vaartis]

Hey there. Read the issue on maud. Have you already tried to use it as a proc macro as suggested in the issue? I don't really have time to do this myself, but i'd accept a PR if you are willing to fix it.

[vaartis]

While using maud as a proc macro does help the error with it, there are still errors building because of all the updated libraries.. Should've pinned the versions, didn't I.