Update Memento to v0.7.0

[ranjanan]

Fixing the dep warn broke dependency on earlier versions (#131), so this bump is required.

[coveralls]

Pull Request Test Coverage Report for Build 413

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 84.041%

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Totals
Change from base Build 411:	0.0%
Covered Lines:	1385
Relevant Lines:	1648

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💛 - Coveralls

[codecov-io]

Codecov Report

Merging #137 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #137   +/-   ##
=======================================
  Coverage   84.04%   84.04%           
=======================================
  Files          13       13           
  Lines        1648     1648           
=======================================
  Hits         1385     1385           
  Misses        263      263

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