feat add missing query methods to immutable

[codecov-commenter]

Codecov Report

Merging #104 (3d41579) into master (6f7c319) will increase coverage by 1.04%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
+ Coverage   91.13%   92.18%   +1.04%     
==========================================
  Files          41       49       +8     
  Lines        5450     5964     +514     
  Branches     5450     5964     +514     
==========================================
+ Hits         4967     5498     +531     
+ Misses        456      438      -18     
- Partials       27       28       +1     

Files	Coverage Δ
src/float/result_collection.rs	56.92% <100.00%> (+26.76%)	:arrow_up:
...le/common/generate_immutable_approx_nearest_one.rs	100.00% <100.00%> (ø)
...c/immutable/common/generate_immutable_nearest_n.rs	100.00% <100.00%> (ø)
...able/common/generate_immutable_nearest_n_within.rs	99.04% <ø> (+1.90%)	:arrow_up:
src/immutable/common/generate_immutable_within.rs	100.00% <100.00%> (ø)
...table/common/generate_immutable_within_unsorted.rs	100.00% <100.00%> (ø)
src/immutable/float/query/approx_nearest_one.rs	100.00% <ø> (ø)
src/immutable/float/query/nearest_n.rs	100.00% <100.00%> (ø)
src/immutable/float/query/within.rs	99.06% <ø> (ø)
src/immutable/float/query/within_unsorted.rs	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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