fix(#9577): support deep object as dynamic arguments

[shasharoman]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the dev branch for v2.x (or to a previous version branch), not the master branch
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• All tests are passing: https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md#development-setup
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:
Fixed issue #9577.

The old modifier matching pattern is /\.[^.]+/g, It does not take into account that dynamic arguments may contain .，so I updated it and hope it is correct.

code example:

const before = /\.[^.]+/g;
const after = /\.[^.\]]+(?=\.|$)/g;

let s = 'name:[a.b].c.d';

console.log(s.match(before)); // [".b]", ".c", ".d"]
console.log(s.match(after));    // [".c", ".d"]

[yyx990803]

Thanks!