Bump lodash from 4.17.15 to 4.17.19 in /jbrowse

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

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

Author: dependabot[bot]

jbrowse/package-lock.json

@@ -18,7 +18,7 @@
     "better-npm-run": "~0.1.0",
     "@gmod/jbrowse": "github:GMOD/jbrowse#1.12.4-release",
     "rimraf": "~2.6.2",
-    "lodash": ">=4.17.12",
+    "lodash": ">=4.17.19",
     "growl": ">=1.10.2",
     "dojox": ">=1.16.3",
     "dijit": ">=1.16.3"