feat(install): support configurations in package.json (#3449)

This PR support set ```puppeteer_skip_chromium_download```, ```puppeteer_download_host``` and ```puppeteer_chromium_revision``` in ```config``` of ```package.json```

Fixes #2262

install.js

@@ -28,13 +28,17 @@ if (process.env.NPM_CONFIG_PUPPETEER_SKIP_CHROMIUM_DOWNLOAD || process.env.npm_c
   console.log('**INFO** Skipping Chromium download. "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" was set in npm config.');
   return;
 }
+if (process.env.NPM_PACKAGE_CONFIG_PUPPETEER_SKIP_CHROMIUM_DOWNLOAD || process.env.npm_package_config_puppeteer_skip_chromium_download) {
+  console.log('**INFO** Skipping Chromium download. "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" was set in project config.');
+  return;
+}
 
-const downloadHost = process.env.PUPPETEER_DOWNLOAD_HOST || process.env.npm_config_puppeteer_download_host;
+const downloadHost = process.env.PUPPETEER_DOWNLOAD_HOST || process.env.npm_config_puppeteer_download_host || process.env.npm_package_config_puppeteer_download_host;
 
 const puppeteer = require('./index');
 const browserFetcher = puppeteer.createBrowserFetcher({ host: downloadHost });
 
-const revision = process.env.PUPPETEER_CHROMIUM_REVISION || process.env.npm_config_puppeteer_chromium_revision
+const revision = process.env.PUPPETEER_CHROMIUM_REVISION || process.env.npm_config_puppeteer_chromium_revision || process.env.npm_package_config_puppeteer_chromium_revision
   || require('./package.json').puppeteer.chromium_revision;
 
 const revisionInfo = browserFetcher.revisionInfo(revision);