switch to new registrator and drop CI support for julia 0.7

[johnnychen94]

more details in https://github.com/JuliaImages/Images.jl/issues/798

blocking PR:

• [x] Images: https://github.com/JuliaImages/Images.jl/pull/800

[codecov[bot]]

Codecov Report

Merging #97 into master will increase coverage by 0.76%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #97      +/-   ##
=========================================
+ Coverage   83.13%   83.9%   +0.76%     
=========================================
  Files           8       8              
  Lines        1091    1081      -10     
=========================================
  Hits          907     907              
+ Misses        184     174      -10

Impacted Files	Coverage Δ
src/utils.jl	60% <0%> (-4.29%)	:arrow_down:
src/ImageFiltering.jl	80% <0%> (-4.22%)	:arrow_down:
src/kernelfactors.jl	73.98% <0%> (-1.85%)	:arrow_down:
src/border.jl	83.63% <0%> (-1.03%)	:arrow_down:
src/mapwindow.jl	79.89% <0%> (+0.85%)	:arrow_up:
src/kernel.jl	98.94% <0%> (+2.04%)	:arrow_up:
src/imfilter.jl	86.6% <0%> (+2.44%)	:arrow_up:
src/specialty.jl	93.75% <0%> (+5.51%)	:arrow_up:

---

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[codecov[bot]]

Codecov Report

Merging #97 into master will decrease coverage by 2%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
- Coverage   83.13%   81.12%   -2.01%     
==========================================
  Files           8        8              
  Lines        1091     1118      +27     
==========================================
  Hits          907      907              
- Misses        184      211      +27

Impacted Files	Coverage Δ
src/utils.jl	60% <0%> (-4.29%)	:arrow_down:
src/ImageFiltering.jl	80% <0%> (-4.22%)	:arrow_down:
src/kernelfactors.jl	72.22% <0%> (-3.62%)	:arrow_down:
src/border.jl	82.63% <0%> (-2.03%)	:arrow_down:
src/imfilter.jl	82.37% <0%> (-1.79%)	:arrow_down:
src/mapwindow.jl	77.77% <0%> (-1.26%)	:arrow_down:
src/kernel.jl	95.91% <0%> (-0.99%)	:arrow_down:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 406327c...1e77caf. Read the comment docs.