Improve can.io.* type hierarchy and annotations
#1158
| Job | Run time |
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| 45s | |
| 18s | |
| 12s | |
| 51s | |
| 2m 56s | |
| 2m 49s | |
| 2m 55s | |
| 3m 2s | |
| 1m 29s | |
| 3m 9s | |
| 3m 29s | |
| 1m 48s | |
| 1m 35s | |
| 2m 19s | |
| 2m 30s | |
| 2m 45s | |
| 3m 1s | |
| 1m 43s | |
| 1m 47s | |
| 3m 0s | |
| 5m 55s | |
| 2m 43s | |
| 6m 54s | |
| 1m 59s | |
| 2m 52s | |
| 0s | |
| 3s | |
| 1h 2m 49s |