Iow 407 - Remove graph-server from waterdataui and create separate repo

Removed graph-server from repo as this is now in its own repo. Updated Makefile and README. In addition added additional boilerplate files now require or recommended by USGS.

Prep for release

Update wdfn viz

Bump rollup from 2.7.6 to 2.9.1 in /assets

Bumps [rollup](https://github.com/rollup/rollup) from 2.7.6 to 2.9.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.7.6...v2.9.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump stylelint-scss from 3.17.1 to 3.17.2 in /assets

Bump karma from 5.0.4 to 5.0.5 in /assets

Bump d3-simple-slider from 1.6.5 to 1.7.0 in /assets

Bump eslint from 6.8.0 to 7.0.0 in /assets

Bump pytest from 5.4.1 to 5.4.2 in /wdfn-server

Bumps [stylelint-scss](https://github.com/kristerkari/stylelint-scss) from 3.17.1 to 3.17.2.
- [Release notes](https://github.com/kristerkari/stylelint-scss/releases)
- [Changelog](https://github.com/kristerkari/stylelint-scss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kristerkari/stylelint-scss/compare/3.17.1...3.17.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.4 to 5.0.5.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v5.0.4...v5.0.5

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [d3-simple-slider](https://github.com/johnwalley/d3-simple-slider) from 1.6.5 to 1.7.0.
- [Release notes](https://github.com/johnwalley/d3-simple-slider/releases)
- [Commits](https://github.com/johnwalley/d3-simple-slider/compare/v1.6.5...v1.7.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.8.0 to 7.0.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.8.0...v7.0.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.1 to 5.4.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.1...5.4.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Iow 208 - Request a specific time series ID

Iow 362 - deal with masked data

Bump luxon