changes to sequences to improve performance

[samuelcolvin]

Benchmarks:

Benchmarks Comparison                                                                                  
┏━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃  Group            ┃  Benchmark                 ┃  Before (µs/iter)  ┃  After (µs/iter)  ┃   Change  ┃
┡━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│  List[TypedDict]  │  list_of_dict_models_core  │             11.69  │            11.66  │   -0.23%  │
├───────────────────┼────────────────────────────┼────────────────────┼───────────────────┼───────────┤
│  List             │  list_of_ints_core_py      │             232.4  │            227.4  │   -2.14%  │
├───────────────────┼────────────────────────────┼────────────────────┼───────────────────┼───────────┤
│  List JSON        │  list_of_ints_core_json    │             98.28  │            100.3  │   +2.05%  │
├───────────────────┼────────────────────────────┼────────────────────┼───────────────────┼───────────┤
│  List[Any]        │  list_of_any_core_py       │             24.72  │            19.67  │  -20.41%  │
├───────────────────┼────────────────────────────┼────────────────────┼───────────────────┼───────────┤
│  List[Nullable]   │  list_of_nullable_core     │             20.44  │            21.00  │   +2.77%  │
└───────────────────┴────────────────────────────┴────────────────────┴───────────────────┴───────────┘

[codecov]

Codecov Report

Merging #179 (20571aa) into main (69bbc9f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #179   +/-   ##
=======================================
  Coverage   97.92%   97.93%           
=======================================
  Files          45       45           
  Lines        4444     4455   +11     
  Branches       32       32           
=======================================
+ Hits         4352     4363   +11     
  Misses         92       92           

Impacted Files	Coverage Δ
src/validators/mod.rs	98.19% <ø> (ø)
src/input/return_enums.rs	96.37% <100.00%> (+1.04%)	⬆️
src/validators/frozenset.rs	100.00% <100.00%> (ø)
src/validators/list.rs	100.00% <100.00%> (ø)
src/validators/set.rs	96.00% <100.00%> (-0.78%)	⬇️
src/validators/tuple.rs	99.03% <100.00%> (-0.06%)	⬇️

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