Bump nodejs version to make new package.

Tag for release.

Bump versions preparing for merge.

Final release.

Create release branch for 5.12

Prepare for alpha release.

 - Changes from 5.10:

    - Features
      - BREAKING: Added support for conditional via-way restrictions. This features changes the file format of osrm.restrictions and requires re-extraction
    - Internals
      - BREAKING: Traffic signals will no longer be represented as turns internally. This requires re-processing of data but enables via-way turn restrictions across highway=traffic_signals
      - Additional checks for empty segments when loading traffic data files
      - Tunes the constants for turns in sharp curves just a tiny bit to circumvent a mix-up in fork directions at a specific intersection (Project-OSRM#4331)
    - Infrastructure
      - Refactor datafacade to make implementing additional DataFacades simpler
    - Bugfixes
      - API docs are now buildable again
      - Suppress unnecessary extra turn instruction when exiting a motorway via a motorway_link onto a primary road (Project-OSRM#4348 scenario 4)
      - Suppress unnecessary extra turn instruction when taking a tertiary_link road from a teritary onto a residential road (Project-OSRM#4348 scenario 2)
      - Various MSVC++ build environment fixes
      - Avoid a bug that crashes GCC6
      - Re-include .npmignore to slim down published modules
      - Fix a pre-processing bug where incorrect directions could be issued when two turns would have similar instructions and we tried to give them distinct values (Project-OSRM#4375)
      - The entry bearing for correct the cardinality of a direction value (Project-OSRM#4353
      - Change timezones in West Africa to the WAT zone so they're recognized on the Windows platform

Update CHANGELOG and npm version for 5.11.0-rc.3

Bump version for 5.11.0-rc.2

Update npm version for RC.1