Fixes dependencies + make compatible with https://github.com/opengovsg/mockpass

[choonkeat-govtech]

before

$ npm audit
# npm audit report

semver  6.0.0 - 6.3.0 || 7.0.0 - 7.5.1
Severity: moderate
semver vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-c2qf-rxjj-qqgw
semver vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-c2qf-rxjj-qqgw
fix available via `npm audit fix`
node_modules/jest-snapshot/node_modules/semver
node_modules/jsonwebtoken/node_modules/semver
node_modules/semver
node_modules/ts-jest/node_modules/semver

word-wrap  <1.2.4
Severity: moderate
word-wrap vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-j8xg-fqg3-53r7
fix available via `npm audit fix`
node_modules/word-wrap

2 moderate severity vulnerabilities

To address all issues, run:
  npm audit fix

after

$ npm audit
found 0 vulnerabilities

[choonkeat-govtech]

switch the package.json references back to GovTechSG
i'd needed to publish as my own package for use in my own app

[choonkeat-govtech]

well, maybe to merge, switch this back

Suggested change

	"name": "@choonkeat/singpass-myinfo-oidc-helper",
	"version": "7.3.1",
	"name": "@govtechsg/singpass-myinfo-oidc-helper",
	"version": "7.3.1",

[choonkeat-govtech]

Suggested change

	"repository": "github:choonkeat-govtech/singpass-myinfo-oidc-helper",
	"bugs": "https://github.com/choonkeat-govtech/singpass-myinfo-oidc-helper/issues",
	"repository": "github:GovTechSG/singpass-myinfo-oidc-helper",
	"bugs": "https://github.com/GovTechSG/singpass-myinfo-oidc-helper/issues",

[Gyunikuchan]

We'll be keeping proxy-agent as we may not be using TLS when hitting a local mock URL