bugfixes, updates, more tests

[ranocha]

This closes #20 and simplifies the code. Additionally, I've updated the Travis settings and moved to Project.toml etc. Moreover, I've fixed the following bug found by @erik-f.

julia> using EllipsisNotation

julia> b = reshape(1:8, 2, 2, 2);

julia> b[.., 1]
2×2 Array{Int64,2}:
 1  3
 2  4

julia> b[.., :, 1]
ERROR: ArgumentError: too many indices provided
Stacktrace:
 [1] fillcolons(::Tuple{Colon,Colon,Colon}, ::Tuple{}, ::Tuple{Colon,Int64}) at ~/.julia/packages/EllipsisNotation/jWHb3/src/EllipsisNotation.jl:13
 [2] fillcolons at ~/.julia/packages/EllipsisNotation/jWHb3/src/EllipsisNotation.jl:15 [inlined] (repeats 3 times)
 [3] fillcolons at ~/.julia/packages/EllipsisNotation/jWHb3/src/EllipsisNotation.jl:10 [inlined]
 [4] to_indices at ~/.julia/packages/EllipsisNotation/jWHb3/src/EllipsisNotation.jl:19 [inlined]
 [5] to_indices at ./indices.jl:321 [inlined]
 [6] getindex(::Base.ReshapedArray{Int64,3,UnitRange{Int64},Tuple{}}, ::EllipsisNotation.Ellipsis, ::Function, ::Int64) at ./abstractarray.jl:1060
 [7] top-level scope at REPL[4]:1

The example from #20:

julia> using BenchmarkTools, EllipsisNotation

julia> u = rand(1, 2, 3);

julia> @benchmark view($u, $1, $..) # that's okay
BenchmarkTools.Trial: 
  memory estimate:  0 bytes
  allocs estimate:  0
  --------------
  minimum time:     1.889 ns (0.00% GC)
  median time:      1.907 ns (0.00% GC)
  mean time:        1.916 ns (0.00% GC)
  maximum time:     18.367 ns (0.00% GC)
  --------------
  samples:          10000
  evals/sample:     1000

julia> u = rand(1, 2, 3, 4);

julia> @benchmark view($u, $1, $..) # that was slow and allocated a lot...
BenchmarkTools.Trial: 
  memory estimate:  0 bytes
  allocs estimate:  0
  --------------
  minimum time:     2.305 ns (0.00% GC)
  median time:      2.361 ns (0.00% GC)
  mean time:        2.455 ns (0.00% GC)
  maximum time:     19.384 ns (0.00% GC)
  --------------
  samples:          10000
  evals/sample:     1000

julia> @benchmark view($u, $1, $:, $:, $:) # that's fast again
BenchmarkTools.Trial: 
  memory estimate:  0 bytes
  allocs estimate:  0
  --------------
  minimum time:     2.516 ns (0.00% GC)
  median time:      2.728 ns (0.00% GC)
  mean time:        2.714 ns (0.00% GC)
  maximum time:     17.892 ns (0.00% GC)
  --------------
  samples:          10000
  evals/sample:     1000

[sloede]

This is crazy! This package has now only 4-5 active lines of code left 🙀

[ChrisRackauckas]

Awesome, ntuple worked! It needed v1.0's interprocedural optimization I guess. Nice!

[ranocha]

Thanks. Would be nice to have a new release using this.

[ChrisRackauckas]

Yup just did. I think it's appropriate to be a 1.0.