Bump prettier version (fix for loop format bugs, address audit warnings)

[ralphcallaway]

at time of writing this we could be using
"prettier": "^2.8.0",
"prettier-plugin-apex": "^1.11.0",
"pretty-quick": "^3.1.3",

[ralphcallaway]

this addresses the bug where a for loop has the type removed, e.g.

for (Contact c : [ becomes for ( c: [

locally i had to also clear the lock file and node modules, but with this versions i also didn't get audit warnings (not that they're matter much in a dev tool, but less noise)