Added lifetime parameters to all the writing systems

[sapient-cogbag]

I don't think this is a breaking change as far as I am aware.

[codecov-io]

Codecov Report

Merging #146 into master will decrease coverage by 0.46%.
The diff coverage is 31.25%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
- Coverage   94.95%   94.49%   -0.47%     
==========================================
  Files          15       15              
  Lines        1783     1797      +14     
==========================================
+ Hits         1693     1698       +5     
- Misses         90       99       +9     

Impacted Files	Coverage Δ
src/write/encoder_string_writer.rs	62.26% <21.42%> (-15.24%)	⬇️
src/write/encoder.rs	88.59% <100.00%> (+0.10%)	⬆️
src/read/decoder_tests.rs	98.32% <0.00%> (ø)
src/decode.rs	92.70% <0.00%> (+0.27%)	⬆️
src/encode.rs	99.00% <0.00%> (+0.33%)	⬆️

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[marshallpierce]

Thanks; I will look into this as soon as I can.

[marshallpierce]

Can you help me understand the use case for this? Since Write is implemented for &mut Write, why do we need to add lifetimes to make it reference-friendly?