Support InitialValues 0.3

[tkf]

• Merge Remove reduce_empty(::AdjoinIdentity, ::Type) InitialValues.jl#64
• Update repo-rev

[codecov]

Codecov Report

Merging #217 (57005ab) into master (8848b9b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #217   +/-   ##
=======================================
  Coverage   90.82%   90.82%           
=======================================
  Files          22       22           
  Lines         534      534           
=======================================
  Hits          485      485           
  Misses         49       49           

Flag	Coverage Δ
unittests	90.82% <ø> (ø)

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