Some CI tweaks

[KristofferC]

• Package was not tested on 1.1

• Package was not tested on 1.0 and 1.1 on Windows.

• Documentation said it was tested on 0.6 and 0.7.

• The AV badge was linked to some old AV run that was last updated a year ago.

• The AV badge image url is likely wrong but I think you need AV access to get the correct url.

[codecov-io]

Codecov Report

Merging #116 into master will increase coverage by 0.66%. The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #116      +/-   ##
========================================
+ Coverage   67.33%    68%   +0.66%     
========================================
  Files           4      4              
  Lines         150    150              
========================================
+ Hits          101    102       +1     
+ Misses         49     48       -1

Impacted Files	Coverage Δ
src/loadfile.jl	60% <0%> (+5%)	:arrow_up:

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[KristofferC]

The failures seem real (but unrelated to the PR).

[ExpandingMan]

These changes were incorporated in another PR. Thanks for your help.