Update versions.

[feuerste]

This is required to fix a linking issue in a crate depending on this:

error: failed to select a version for `ring`.
    ... required by package `sct v0.5.0`
    ... which is depended on by `ct-logs v0.5.0`
    ... which is depended on by `hyper-rustls v0.16.0`
    ... which is depended on by `rusoto_core v0.38.0`
    ... which is depended on by `avxrays v0.3.0 (/media/disk2/dev/avmapping-geometry/avxrays)`
versions that meet the requirements `^0.14` are: 0.14.6, 0.14.5, 0.14.4, 0.14.3, 0.14.2, 0.14.1, 0.14.0

the package `ring` links to the native library `ring-asm`, but it conflicts with a previous package which links to `ring-asm` as well:
package `ring v0.13.5`
    ... which is depended on by `cookie v0.11.1`
    ... which is depended on by `actix-web v0.7.19`
    ... which is depended on by `octree_web_viewer v0.1.0 (/media/disk2/dev/avmapping-geometry/third_party/point_cloud_viewer/octree_web_viewer)`
    ... which is depended on by `point_viewer_http v0.1.0 (/media/disk2/dev/avmapping-geometry/point_viewer_http)`

failed to select a version for `ring` which could resolve this conflict

Please review with Hide whitespace changes switched on

[feuerste]

Thanks for your reviews!