Smaller TLDs footprint

[nfrasser]

Using an encoded trie inspired by @bacloud23's solution in #416. The encoded TLDs result in about 3kB in savings. The remaining size savings are mainly thanks to dropping support for older browsers in 0ad7a99 and #425

[coveralls]

Pull Request Test Coverage Report for Build 3834327161

• 31 of 32 (96.88%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.08%) to 95.985%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/linkifyjs/src/linkify.js	3	4	75.0%

Totals
Change from base Build 3833587067:	0.08%
Covered Lines:	1121
Relevant Lines:	1140

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 3834327161

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 31 of 32 (96.88%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.08%) to 95.985%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/linkifyjs/src/linkify.js	3	4	75.0%

Totals
Change from base Build 3833587067:	0.08%
Covered Lines:	1121
Relevant Lines:	1140

---

💛 - Coveralls