Generate connection with port as number when using --generate-connections CLI arg

[silwalanish]

Issue

The connections.sync-db.json generated using --generate-connections creates the connection with port as string while sync-db expect a number.

$ sync-db --generate-connections

Else it fails with the error:
Error: An error occurred: TypeError: The "config.options.port" property must be of type number.
For example,
Following env produces the connections below:
env

DB_CLIENT=mssql
DB_HOST=localhost
DB_PORT=1433
DB_USERNAME=user
DB_PASSWORD=Password@123
DB_NAME=db1
DB_ENCRYPTION=true

Actual connections.sync-db.json

{
  "connections": [
    {
      "client": "mssql",
      "host": "localhost",
      "port": "1433",
      "user": "user",
      "password": "Password@123",
      "database": "db1",
      "options": {
        "encrypt": "true"
      }
    }
  ]
}

Expected connections.sync-db.json

{
  "connections": [
    {
      "client": "mssql",
      "host": "localhost",
      "port": 1433,
      "user": "user",
      "password": "Password@123",
      "database": "db1",
      "options": {
        "encrypt": "true"
      }
    }
  ]
}

Fix

• Cast DB_PORT to number when generating connection from env

[codecov-io]

Codecov Report

Merging #40 into master will decrease coverage by 0.12%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master     #40      +/-   ##
=========================================
- Coverage   26.72%   26.6%   -0.13%     
=========================================
  Files          12      12              
  Lines         217     218       +1     
  Branches       15      16       +1     
=========================================
  Hits           58      58              
- Misses        158     159       +1     
  Partials        1       1

Impacted Files	Coverage Δ
src/config.ts	0% <0%> (ø)	⬆️

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