chore(deps-dev): bump prettier to v2

[trivikr]

Issue #, if available:

• prettier-vscode@4.0.0 is not backward compatible prettier-vscode@4.0.0 uses prettier@2.x config by default prettier/prettier-vscode#1290
• New syntax of TypeScript 3.8 is only supported on prettier@2 https://prettier.io/blog/2020/03/21/2.0.0.html#typescript

Description of changes:

• bumps prettier to v2
• retains default prettier config from v1 in private package @aws-sdk/prettier-config

Manually restored following folders, as it contains files which are not prettified (to be done separately):

• codegen/
• packages/smithy-client/
• protocol_tests/

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-io]

Codecov Report

Merging #1079 into master will decrease coverage by 12.67%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1079       +/-   ##
===========================================
- Coverage   91.49%   78.81%   -12.68%     
===========================================
  Files         146      279      +133     
  Lines        2868    11594     +8726     
  Branches      511     2401     +1890     
===========================================
+ Hits         2624     9138     +6514     
- Misses        244     2456     +2212     

Impacted Files	Coverage Δ
packages/hash-stream-node/src/index.ts	90.00% <0.00%> (ø)
...sts/aws-query/commands/SimpleInputParamsCommand.ts	88.23% <0.00%> (ø)
.../HttpRequestWithLabelsAndTimestampFormatCommand.ts	88.23% <0.00%> (ø)
...ws-query/commands/IgnoresWrappingXmlNameCommand.ts	100.00% <0.00%> (ø)
...tests/aws-restxml/commands/XmlNamespacesCommand.ts	100.00% <0.00%> (ø)
...s/aws-restjson/commands/NoInputAndOutputCommand.ts	100.00% <0.00%> (ø)
.../commands/HttpPayloadTraitsWithMediaTypeCommand.ts	100.00% <0.00%> (ø)
...-restxml/commands/XmlAttributesOnPayloadCommand.ts	100.00% <0.00%> (ø)
...l_tests/aws-ec2/commands/QueryTimestampsCommand.ts	88.23% <0.00%> (ø)
...s-restxml/commands/HttpRequestWithLabelsCommand.ts	88.23% <0.00%> (ø)
... and 124 more

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[aws-sdk-js-automation]

AWS CodeBuild CI Report

• CodeBuild project: sdk-staging-test
• Commit ID: dbb74e4
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[trivikr]

Superseded by simplified PR #1083

[lock]

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