Get rid of StandardCharsets.UTF_8

[essobedo]

There are many classes in the code base that rely on the public constant StandardCharsets.UTF_8 which is not a good solution for data duplication because:

1. It introduces coupling between all those classes and StandardCharsets such that if the value is modified or simply removed those classes won't work properly anymore or won't even compile.
2. it reduces the global cohesion of those classes as they have to add their own semantics to this external constant with no real meaning instead of focusing on their own task .

More details here and/or Section 2.5 of the book Elegant Objects.

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- `664-ddd2c9b3`/#674 (by Dalí Freire Dias dos Santos)

[davvd]

@yegor256 please do something about this issue

[davvd]

@essobedo I added milestone 1.0 to this issue, let me know if there has to be something else

[davvd]

@xupyprmv it's yours,please go ahead

[davvd]

@essobedo many thanks for the report, I topped your account for 15 mins, transaction 84402755

[xupyprmv]

@davvd I added PR #670. Please find someone to review.

[davvd]

@davvd I added PR #670. Please find someone to review.

@xupyprmv thank you!

[davvd]

@essobedo there is a puzzle in this code 664-ddd2c9b3/#674, we'll resolve it later

[xupyprmv]

@essobedo PR #670 was merged. Please close this ticket.

[xupyprmv]

@davvd This ticket is closed.

[davvd]

@ypshenychka please, let us know what do you think about this ticket, according to our QA rules

[ypshenychka]

@davvd Quality is good.

[davvd]

@davvd Quality is good.

@ypshenychka thanks a lot

[davvd]

@xupyprmv just added 10 mins to @ypshenychka (for QA), payment ID is 85782608; Thanks for your contribution, 30 mins was added to your account, payment ID is AP-0AT68670G4324460D, 241 hours and 45 mins spent total; added +30 to your rating, now it is equal to +315

[davvd]

@essobedo the last puzzle 664-ddd2c9b3/#674 originated from here solved