Bump julia version to v0.7-alpha

[pkofod]

is this what you meant @ChrisRackauckas ?

[codecov]

Codecov Report

Merging #34 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #34   +/-   ##
=======================================
  Coverage   60.05%   60.05%           
=======================================
  Files           5        5           
  Lines         383      383           
=======================================
  Hits          230      230           
  Misses        153      153

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[coveralls]

Coverage remained the same at 60.052% when pulling cb6ded8 on pkofod:patch-2 into cd80e68 on JuliaDiffEq:master.

[ChrisRackauckas]

Yeah, now Femto should come.