chore(types): Update TypeScript and fix linting for exported types

[kibertoad]

Is this ready to be merged into Dynamoose? (select 1):

• Yes
• No

Other:

• I have searched through the GitHub pull requests to ensure this PR has not already been submitted
• I agree that all changes made in this pull request may be distributed and are made available in accordance with the Dynamoose license
• All of my commits and commit messages are detailed, explain what changes were made, and are easy to follow and understand
• I have filled out all fields above

[coveralls]

Pull Request Test Coverage Report for Build 1142

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.485%

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Totals
Change from base Build 1118:	0.0%
Covered Lines:	2106
Relevant Lines:	2406

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💛 - Coveralls

[fishcharlie]

@kibertoad Although I appreciate the PR, I kinda doubt this will get merged. With the version 2.0 rewrite (#677) there are lots of changes coming. The importance and bar for PRs to reach to get merged prior to 2.0 will continue to increase as more work is done on 2.0.

Just to make sure, this PR looks to be mainly styling changes. Is that correct, or am I missing something?

[kibertoad]

Yup.