Compare versions of joi

[afharo]

joi has improved a bit with the newer versions. This PR adds the comparison between joi@13 and joi@17 (latest).

The results are:

node --version
v14.16.1

Valid input:

runtypes x 284,518 ops/sec ±1.06% (84 runs sampled)
io-ts x 757,623 ops/sec ±0.90% (86 runs sampled)
io-ts (using is instead of decode) x 2,449,756 ops/sec ±0.80% (88 runs sampled)
tcomb-validation x 77,336 ops/sec ±1.09% (86 runs sampled)
joi@13 x 59,894 ops/sec ±0.51% (90 runs sampled)
joi@17 x 78,412 ops/sec ±0.85% (87 runs sampled)
ajv x 9,189,166 ops/sec ±0.76% (89 runs sampled)
Fastest is ajv

Invalid input:

runtypes x 276,551 ops/sec ±1.02% (89 runs sampled)
io-ts x 621,990 ops/sec ±1.32% (90 runs sampled)
io-ts (using is instead of decode) x 2,593,926 ops/sec ±0.91% (84 runs sampled)
tcomb-validation x 49,194 ops/sec ±0.91% (88 runs sampled)
joi@13 x 15,160 ops/sec ±0.96% (89 runs sampled)
joi@17 x 45,473 ops/sec ±0.84% (89 runs sampled)
ajv x 6,781,009 ops/sec ±0.71% (90 runs sampled)
Fastest is ajv