ci: test with 1, lts and pre versions of julia
#169
| Job | Run time |
|---|---|
| 16m 43s | |
| 11m 46s | |
| 21m 30s | |
| 40m 45s | |
| 23m 3s | |
| 40m 54s | |
| 15m 8s | |
| 14m 3s | |
| 18m 19s | |
| 51m 35s | |
| 41m 4s | |
| 59m 17s | |
| 23m 28s | |
| 14m 24s | |
| 26m 57s | |
| 6h 58m 56s |