feat: package rename in npm

[sofisl]

Addresses #364

[generated-files-bot[bot]]

Warning: This pull request is touching the following templated files:

• .kokoro/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node10/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node10/docs.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node12/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node12/lint.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node12/samples-test.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node12/system-test.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/continuous/node8/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node10/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node10/docs.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node10/lint.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node12/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node12/samples-test.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node12/system-test.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/node8/common.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/presubmit/windows/test.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/release/docs-devsite.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/release/docs.cfg - .kokoro files are templated and should be updated in synthtool
• .kokoro/release/publish.cfg - .kokoro files are templated and should be updated in synthtool
• README.md - README.md is managed by synthtool. However, a partials file can be used to update the README, e.g.: https://github.com/googleapis/nodejs-storage/blob/master/.readme-partials.yaml

[sofisl]

@bcoe, would you mind confirming these changes one more time? I had to make all the changes to the repo's names at once, since they changed in google3.