v3.3.2: Support hhvm-nightly and HHVM 4.161

What's Changed

• Update minimal HHVM version to 4.144 by @Atry in #75
• Typo fix and remove old content from README by @lexidor in #77
• Remove hhvm/hsl from the dependencies by @lexidor in #76
• Require and test on supported HHVM LTS 4.153 by @alexeyt in #78
• Support hhvm-nightly, expected to support 4.161. by @lexidor in #79

New Contributors

• @Atry made their first contribution in #75
• @alexeyt made their first contribution in #78

Full Changelog: v3.2.1...v3.3.2