api.ts: added data route for updating sector data.
company.ts: added an insert query for adding sector data into db.
companyDataMethods.ts: route the middleware for submitting pairs of id: sector to the insert query
fields added to response object to get /companyList:
{ "sector": "Real Estate", }
api.ts: added data route for updating sector data. company.ts: added an insert query for adding sector data into db. companyDataMethods.ts: route the middleware for submitting pairs of id: sector to the insert query
fields added to response object to get /companyList: { "sector": "Real Estate", }