Regular expression causes exponential backtracking on Lua

[aldy505]

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

   flourite/src/languages/lua.ts

   Line 30 in 313def7

   { pattern: /{\s*(\S+)((,|;)\s*\S+)*\s*}/, type: 'constant.array' },

2. This part of the regular expression may cause exponential backtracking on strings starting with '{!=!,' and containing many repetitions of '!=!,'.
   

   flourite/src/languages/lua.ts

   Line 32 in 313def7

   { pattern: /{\s*(\S+\s*=\s*\S+)((,|;)\s*\S+\s*=\s*\S+)*\s*}/, type: 'constant.dictionary' },

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 the detailed issue.