Upgrade freetype

[j4qfrost]

No description provided.

[jdm]

error[E0432]: unresolved import `fontconfig`

   --> src/sources/fontconfig.rs:236:9

    |

236 |     use fontconfig::fontconfig as ffi;

    |         ^^^^^^^^^^ use of undeclared type or module `fontconfig`

warning: unnecessary parentheses around block return value

    --> src/loaders/freetype.rs:1199:9

     |

1199 |         (self.to_f32() * (1.0 / 64.0))

     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

     |

     = note: `#[warn(unused_parens)]` on by default

error[E0699]: the type of this value must be known to call a method on a raw pointer on it

   --> src/sources/fontconfig.rs:414:27

    |

414 |                 if string.is_null() {

    |                           ^^^^^^^

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0432, E0699.

For more information about an error, try `rustc --explain E0432`.

error: could not compile `font-kit`.

[jdm]

Looks like this got messed up - we still need to depend on fontconfig, and the freetype dependency should still be conditional.

[atouchet]

This was done in #150 and #152.