0.1.9

• Updated dependencies.
• Added dyn to Fail::cause() to fix warning.
• Added missing allocator.cpp to source_files in build.rs and in Cargo.toml package include list.
• Made the crate buildable on WebAssembly.
• Fixed build under toolchain 'windows-gnu'.
• Updated vendoring of meshoptimizer to commit hash 7cf4a53ece15fa7526410a6d4cae059bd5593178.