Sibling PR of DPPL#301

[torfjelde]

Updates Turing.jl to be compatible with TuringLang/DynamicPPL.jl#301.

Tests are passing locally, but need new release of DPPL for tests to pass.

[torfjelde]

I'll get this merged once DPPL is released and tests pass.

[cpfiffer]

Oh man I love this. Thumbs up from me!

[coveralls]

Pull Request Test Coverage Report for Build 1131092986

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 80.071%

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Totals
Change from base Build 1128200924:	0.5%
Covered Lines:	1125
Relevant Lines:	1405

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💛 - Coveralls

[codecov]

Codecov Report

Merging #1681 (3c78ff9) into master (d924caf) will increase coverage by 0.50%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1681      +/-   ##
==========================================
+ Coverage   79.56%   80.07%   +0.50%     
==========================================
  Files          23       23              
  Lines        1414     1405       -9     
==========================================
  Hits         1125     1125              
+ Misses        289      280       -9     

Impacted Files	Coverage Δ
src/modes/ModeEstimation.jl	91.07% <100.00%> (+6.77%)	⬆️

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[yebai]

Thanks, @torfjelde - excellent work!