Update dependencies.

Kept underscore to 1.6.x due to test failures.
package.json: sort some stuff alphabetically.
Merge pull request #1930 from XhmikosR/deps

Update dependecies. Alphabetize package.json lists.
2.5.8
Allow string literal dereferencing as first stmt

Fixes gh-1937
Parse/lint NameSpaceImport module declaration.

Closes gh-1936
Updates to yield delegation linting. Fixes gh-1544
Fix insane indents.
Restore fixture
Use state.tokens.next.value
Remove redundant esnext flag check
Lint classes better (much better) --- Fixes gh-1940

So, so much better!

Closes #1947
Fix typos in comments

Closes #1950
Implement `singleGroups` option
fixup! Correct typo
fixup! Correct typo in unit tests
Merge pull request #1948 from rwaldron/1544

Updates to yield delegation linting. Fixes gh-1544
Merge pull request #1945 from caitp/issue-1936

Parse/lint NameSpaceImport module declaration.
2.5.9
Add support for BinaryIntegerLiteral and OctalIntegerLiteral.