Update CI URLs to point to new caching infrastructure

[staticfloat]

Hello there!
This is an automated pull request submitted by @staticfloat to help package authors transition their Julia installation CI setups to the new binary provider URL. Please take a look at this PR, and if there is a problem or it doesn't download correctly when CI runs, feel free to ping @staticfloat

[coveralls]

Coverage remained the same at 96.445% when pulling 8791937 on staticfloat:updated_ci_url into ae9fb31 on JuliaFinance:master.

[codecov]

Codecov Report

Merging #84 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #84   +/-   ##
=======================================
  Coverage   96.44%   96.44%           
=======================================
  Files          17       17           
  Lines         422      422           
=======================================
  Hits          407      407           
  Misses         15       15

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