v0.14.0

Language features updates:

• Rust Edition 2018
• Uses dyn keyword for Trait objects.

New features:

• #118 Add Decimal128 supports with decimal crate, could be enabled by feature decimal128
  • Experimental feature, may be replaced by #125 in the future
• #119 Implement Extend<(String, Bson)> for OrderedDocument
• #114 Use random byte array instead of process_id and machine_id (for WASM supports)
• #123 Add mutable accessors for Bson variants (as_*_mut())
• #124 Uses std::convert::TryFrom instead of try_from crate

Bug fixed:

• #116 Malformed BSON may trigger large memory allocation. Binary type is limited to maximum length 16MiB.