error: failed to select a version for `ring`.
    ... required by package `bitfinex v0.4.0`
    ... which is depended on by `testcrate v0.1.0 (/home/test/testcrate)`
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 v0.16.0`
    ... which is depended on by `binance v0.10.0`
    ... which is depended on by `testcrate v0.1.0 (/home/test/testcrate)`

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