Backport Option Fixes to 0.11.x

[etspaceman]

No description provided.

[codecov-io]

Codecov Report

Merging #1317 into backport/0.11.x will decrease coverage by 0.03%.
The diff coverage is 85%.

@@                 Coverage Diff                 @@
##           backport/0.11.x    #1317      +/-   ##
===================================================
- Coverage            84.39%   84.35%   -0.04%     
===================================================
  Files                   76       76              
  Lines                 2435     2448      +13     
  Branches               178      112      -66     
===================================================
+ Hits                  2055     2065      +10     
- Misses                 380      383       +3

Impacted Files	Coverage Δ
.../core/shared/src/main/scala/io/circe/Decoder.scala	90.59% <85%> (-0.53%)	⬇️
...d/src/main/scala/io/circe/NonEmptySeqDecoder.scala	91.66% <0%> (-8.34%)	⬇️
...rc/main/scala/io/circe/numbers/BiggerDecimal.scala	89.75% <0%> (-0.61%)	⬇️
...re/shared/src/main/scala/io/circe/JsonNumber.scala	93.75% <0%> (+1.25%)	⬆️
...re/shared/src/main/scala/io/circe/KeyDecoder.scala	100% <0%> (+2.7%)	⬆️

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[travisbrown]

Thanks, @etspaceman!