Bump elliptic from 6.5.5 to 6.5.7 in /packages/powerbi (#717)

* Bump elliptic from 6.5.5 to 6.5.7 in /packages/powerbi

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.5 to 6.5.7.
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.5...v6.5.7)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

* remove monorepo refs

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dan Marshall <danmar@microsoft.com>

packages/powerbi/package-lock.json

@@ -2510,9 +2510,9 @@
       "dev": true
     },
     "node_modules/elliptic": {
-      "version": "6.5.5",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.5.tgz",
-      "integrity": "sha512-7EjbcmUm17NQFu4Pmgmq2olYMj8nwMnpcddByChSUjArp8F5DQWcIcpriwO4ZToLNAJig0yiyjswfyGNje/ixw==",
+      "version": "6.5.7",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
+      "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
       "dev": true,
       "dependencies": {
         "bn.js": "^4.11.9",
@@ -9503,9 +9503,9 @@
       "dev": true
     },
     "elliptic": {
-      "version": "6.5.5",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.5.tgz",
-      "integrity": "sha512-7EjbcmUm17NQFu4Pmgmq2olYMj8nwMnpcddByChSUjArp8F5DQWcIcpriwO4ZToLNAJig0yiyjswfyGNje/ixw==",
+      "version": "6.5.7",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
+      "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
       "dev": true,
       "requires": {
         "bn.js": "^4.11.9",