say: canonical-data needs improvement.

[Insti]

In the canonical data for the "say" problem: https://github.com/exercism/x-common/blob/master/exercises/say/canonical-data.json

• The descriptions should be descriptive.

In most cases the description is the same as the output.

        {
            "description": "zero",
            "input": 0,
            "expected": "zero"
        },

The description should describe the test, and why it is useful to test that particular number.

• Should test all available numbers.

A purely test driven implementation of these tests would miss out a lot of numbers. (particularly the teens and tens)