Block view of blocked range returns a range

[jishnub]

After this,

julia> b = blockedrange([1,2,3])
3-blocked 6-element BlockedUnitRange{Vector{Int64}}:
 1
 ─
 2
 3
 ─
 4
 5
 6

julia> view(b, Block(1))
1:1

julia> view(b, Block(3))
4:6

This matches the behavior of a UnitRange.

[codecov]

Codecov Report

Merging #298 (c85dbc7) into master (7b83868) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #298      +/-   ##
==========================================
- Coverage   92.29%   92.17%   -0.12%     
==========================================
  Files          16       16              
  Lines        1479     1482       +3     
==========================================
+ Hits         1365     1366       +1     
- Misses        114      116       +2     

Impacted Files	Coverage Δ
src/blockaxis.jl	95.71% <100.00%> (+0.03%)	⬆️

... and 2 files with indirect coverage changes

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