Bump lodash from 4.17.15 to 4.17.21 in /beacon/wasm
Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.15...4.17.21)
Signed-off-by: dependabot[bot] <[email protected]>