Adapting Huggingfaceapi

[chengchingwen]

follow up #83.

Rewrite huggingface module with Huggingfaceapi.jl and handle the tokenizer.

[codecov]

Codecov Report

Merging #103 (0ae19c0) into master (9bd6b85) will decrease coverage by 1.28%.
The diff coverage is 2.53%.

@@            Coverage Diff             @@
##           master     #103      +/-   ##
==========================================
- Coverage   22.05%   20.76%   -1.29%     
==========================================
  Files          69       76       +7     
  Lines        3378     3616     +238     
==========================================
+ Hits          745      751       +6     
- Misses       2633     2865     +232     

Impacted Files	Coverage Δ
src/Transformers.jl	0.00% <ø> (ø)
src/experimental/model.jl	0.00% <0.00%> (ø)
src/huggingface/HuggingFace.jl	0.00% <0.00%> (ø)
src/huggingface/configs/auto.jl	0.00% <0.00%> (ø)
src/huggingface/configs/config.jl	0.00% <0.00%> (ø)
src/huggingface/configs/pretrain.jl	0.00% <0.00%> (ø)
src/huggingface/download.jl	0.00% <0.00%> (ø)
src/huggingface/implementation/bert/config.jl	0.00% <ø> (ø)
src/huggingface/implementation/bert/model.jl	0.00% <0.00%> (ø)
src/huggingface/implementation/bert/tokenizer.jl	0.00% <0.00%> (ø)
... and 11 more

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