build(deps): bump sequelize from 6.1.0 to 6.2.1

[dependabot-preview]

Bumps sequelize from 6.1.0 to 6.2.1.

Release notes

Sourced from sequelize's releases.

v6.2.1

6.2.1 (2020-06-27)

Bug Fixes

• mssql: insert/upsert operations do not return all fields (#12433) (aeb318a)

v6.2.0

6.2.0 (2020-06-26)

Bug Fixes

• types: references support for string (#12407) (962ed3c)

Features

• types: added optional stricter typing for Model attributes (#12405) (871157b)

v6.1.1

6.1.1 (2020-06-26)

Bug Fixes

• mssql: returning data for bulkUpdate (#12413) (e36212c)

Commits

• 5473751 docs(typescript): error in the name of interface (#12430)
• aeb318a fix(mssql): insert/upsert operations do not return all fields (#12433)
• 962ed3c fix(types): references support for string (#12407)
• 871157b feat(types): added optional stricter typing for Model attributes (#12405)
• e36212c fix(mssql): returning data for bulkUpdate (#12413)
• 77b5fe6 docs: add mention for QueryInterface breaking changes
• ddde7dc docs: update upgrade guide
• See full diff in compare view

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[codecov]

Codecov Report

Merging #453 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #453   +/-   ##
=======================================
  Coverage   80.61%   80.61%           
=======================================
  Files           7        7           
  Lines          98       98           
  Branches        6        6           
=======================================
  Hits           79       79           
  Misses         18       18           
  Partials        1        1           

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