Regular expression caused exponential backtracking on Java

[aldy505]

1. This part of the regular expression may cause exponential backtracking on strings starting with 'class' and containing many repetitions of 'a'.
   

   flourite/src/languages/java.ts

   Line 15 in 313def7

   { pattern: /(public\s*)?class\s*(.*)+(\s)?\{/, type: 'keyword' },

According to the LGTM rule (click that link to see detailed rule):

Some regular expressions take a long time to match certain input strings to the point where the time it takes to match a string of length n is proportional to n^k or even 2ⁿ. Such regular expressions can negatively affect performance, or even allow a malicious user to perform a Denial of Service ("DoS") attack by crafting an expensive input string for the regular expression to match.

See LGTM for detailed issue.