Add S3 upload mode

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Lines Of Code

Language	Files	Lines	Code	Comments	Blanks	Complexity	Bytes
Go	14	1981 (+50)	1560 (+40)	58	363 (+10)	255 (+13)	51.8K (+888B)
Markdown	1	243 (+2)	194 (+2)	0	49	0	9.2K (+169B)
YAML	8 (+1)	539 (+17)	465 (+11)	43 (+5)	31 (+1)	0	17.9K (+688B)

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Unit Test Coverage

total: (statements) 55.0%

Coverage diff with base branch

```diff ```

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Codecov Report

Merging #25 (46d9d62) into master (9bdbfe2) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #25   +/-   ##
=======================================
  Coverage   48.07%   48.07%           
=======================================
  Files           7        7           
  Lines         597      597           
=======================================
  Hits          287      287           
  Misses        268      268           
  Partials       42       42           

Flag	Coverage Δ
unittests	48.07% <ø> (ø)

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Go API Changes

# github.com/vearutop/plt/s3
## compatible changes
Flags.Upload: added

# summary
Inferred base version: v0.3.3
Suggested version: v0.4.0

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Benchmark Result

Benchmark diff with base branch

``` name old time/op new time/op delta pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 20.0µs ± 2% 20.2µs ± 2% ~ (p=0.111 n=5+5) pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 1.00ms ± 0% 1.00ms ± 0% ~ (p=0.841 n=5+5) name old alloc/op new alloc/op delta pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 1.83kB ± 0% 1.84kB ± 1% +0.25% (p=0.016 n=4+5) pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 5.91kB ± 0% 5.91kB ± 1% ~ (p=0.730 n=5+5) name old allocs/op new allocs/op delta pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 26.0 ± 0% 26.0 ± 0% ~ (all equal) pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 87.0 ± 0% 87.0 ± 0% ~ (all equal) ```

Benchmark result

``` name time/op pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 20.2µs ± 2% pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 1.00ms ± 0% name alloc/op pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 1.84kB ± 1% pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 5.91kB ± 1% name allocs/op pkg:github.com/vearutop/plt/fasthttp goos:linux goarch:amd64 JobProducer_Job-2 26.0 ± 0% pkg:github.com/vearutop/plt/nethttp goos:linux goarch:amd64 JobProducer_Job-2 87.0 ± 0% ```