Move FormulaMaterializer to formulaic.materializers.types for parity with parser.
#260
| Job | Run time |
|---|---|
| 1m 44s | |
| 1m 11s | |
| 1m 3s | |
| 1m 7s | |
| 1m 1s | |
| 1m 10s | |
| 1m 26s | |
| 8m 42s |