fix: fixing CI error by setting sequelize-typescript to version 2.1.2

[samstefan]

This pull request fixes #60

sequelize-typescript 2.1.3 is not compatible with sequelize 6.10.0 due to this change sequelize/sequelize-typescript#1202

sequelize-typescript 2.1.3 was being installed in the CI due to the --no-lockfile flag passed to yarn.

[casbin-bot]

@Gabriel-403 @Zxilly @kingiw @nodece please review

[coveralls]

Pull Request Test Coverage Report for Build 2234879957

• 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 86.207%

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Totals
Change from base Build 2234412466:	0.0%
Covered Lines:	100
Relevant Lines:	108

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💛 - Coveralls

[samstefan]

@hsluoyz Do you know when this change will be published to NPM?

[hsluoyz]

@samstefan it is supposed to release new version, can you check why it failed?

sequelize-adapter/.github/workflows/ci.yml

Lines 43 to 65 in 9c48749

	semantic-release:
	needs: [finish, build]
	runs-on: ubuntu-latest
	services:
	mysql:
	image: mysql:latest
	ports:
	- 3306:3306
	env:
	MYSQL_ALLOW_EMPTY_PASSWORD: yes
	options: --health-cmd="mysqladmin ping" --health-interval=5s --health-timeout=2s --health-retries=3
	steps:
	- uses: actions/checkout@v2
	- name: Run semantic-release
	if: github.repository == 'node-casbin/sequelize-adapter' && github.event_name == 'push'
	run: |
	yarn install --no-lockfile
	mysql --host 127.0.0.1 --port 3306 -uroot -p -e "CREATE DATABASE casbin"
	yarn run prepack
	yarn run release
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	NPM_TOKEN: ${{ secrets.NPM_TOKEN }}