consider ... operator for "array of even numbers from 1 to 100"

```
perl6 -e '(2, 4 ... 100).say'
(2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100)
```