BLD: fix warning for missing dependency, and dev version number
BLD: fix warning for missing dependency, and dev version number

Relevant warnings that are fixed look like:

```
fatal: bad revision '^v1.7.0'
```

```
Error: 'None' must be installed before running the build.
```

rgommers/scipy,WarrenWeckesser/scipy,endolith/scipy,e-q/scipy,mdhaber/scipy,anntzer/scipy,zerothi/scipy,Stefan-Endres/scipy,anntzer/scipy,e-q/scipy,WarrenWeckesser/scipy,scipy/scipy,scipy/scipy,vigna/scipy,grlee77/scipy,perimosocordiae/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,ilayn/scipy,Eric89GXL/scipy,Eric89GXL/scipy,matthew-brett/scipy,zerothi/scipy,anntzer/scipy,rgommers/scipy,grlee77/scipy,mdhaber/scipy,andyfaff/scipy,WarrenWeckesser/scipy,andyfaff/scipy,andyfaff/scipy,e-q/scipy,vigna/scipy,anntzer/scipy,ilayn/scipy,zerothi/scipy,perimosocordiae/scipy,rgommers/scipy,Eric89GXL/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,Eric89GXL/scipy,endolith/scipy,rgommers/scipy,grlee77/scipy,scipy/scipy,rgommers/scipy,andyfaff/scipy,endolith/scipy,Eric89GXL/scipy,vigna/scipy,ilayn/scipy,mdhaber/scipy,tylerjereddy/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,e-q/scipy,mdhaber/scipy,zerothi/scipy,e-q/scipy,Eric89GXL/scipy,andyfaff/scipy,matthew-brett/scipy,ilayn/scipy,WarrenWeckesser/scipy,matthew-brett/scipy,ilayn/scipy,endolith/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,grlee77/scipy,zerothi/scipy,mdhaber/scipy,scipy/scipy,perimosocordiae/scipy,matthew-brett/scipy,vigna/scipy,grlee77/scipy,vigna/scipy,andyfaff/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,perimosocordiae/scipy,zerothi/scipy,scipy/scipy,scipy/scipy,matthew-brett/scipy,anntzer/scipy,ilayn/scipy,endolith/scipy,Stefan-Endres/scipy,anntzer/scipy,endolith/scipy,mdhaber/scipy