On my Bionic box, I see there's a few direct reverse dependencies:

$ apt-rdepends --reverse libv8-3.14.5
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libv8-3.14.5
  Reverse Depends: libv8-3.14-dbg (= 3.14.5.8-11ubuntu1)
  Reverse Depends: libv8-3.14-dev (= 3.14.5.8-11ubuntu1)
  Reverse Depends: libv8-dev (= 3.14.5.8-11ubuntu1)
  Reverse Depends: postgresql-10-plv8 (1:1.4.10.ds-2)
  Reverse Depends: r-cran-v8 (1.5-1)
  Reverse Depends: uwsgi-plugin-v8 (2.0.15+10+0.0.3)
libv8-3.14-dbg
libv8-3.14-dev
libv8-dev
postgresql-10-plv8
  Reverse Depends: postgresql-10-plv8-dbgsym (= 1:1.4.10.ds-2)
postgresql-10-plv8-dbgsym
r-cran-v8
  Reverse Depends: r-cran-v8-dbgsym (= 1.5-1)
r-cran-v8-dbgsym
uwsgi-plugin-v8
  Reverse Depends: uwsgi-plugin-v8-dbgsym (= 2.0.15+10+0.0.3)
uwsgi-plugin-v8-dbgsym


$ acsh postgresql-10-plv8
Package: postgresql-10-plv8
Architecture: amd64
Version: 1:1.4.10.ds-2
Priority: extra
Section: universe/database
Source: plv8
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian PostgreSQL Maintainers <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 131
Provides: postgresql-plv8
Depends: postgresql-10, libc6 (>= 2.14), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2), libv8-3.14.5
Filename: pool/universe/p/plv8/postgresql-10-plv8_1.4.10.ds-2_amd64.deb
Size: 47592
MD5sum: 84d40c9333535f5fee482e59ea398eab
SHA1: 7f05205564529b1962a343e3ac640d3b35c03697
SHA256: 2af68464c9b39f8af33c79e17b9c3ef65cb7e37d56d39efbe48bf166394bdd9e
Homepage: https://github.com/plv8/plv8
Description-en: Procedural language interface between PostgreSQL and JavaScript
 V8 is a high performance JavaScript engine written in C++.  It is used
 in the document-oriented data store MongoDB.
 .
 PostgreSQL is an open source SQL database server.
 .
 This package provides a procedural language interface to JavaScript from
 PostgreSQL. Procedural languages are used to write functions
 which can be called in database queries.
Description-md5: cb193632a564b400b3bf3ac64a8d0cec


$ acsh r-cran-v8
Package: r-cran-v8
Architecture: amd64
Version: 1.5-1
Priority: optional
Section: universe/gnu-r
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian Science Maintainers <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 1007
Depends: r-base-core (>= 3.4.2-1ubuntu2), r-api-3.4, r-cran-rcpp (>= 0.12), r-cran-jsonlite (>= 1.0), r-cran-curl (>= 1.0), libc6 (>= 2.14), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2), libv8-3.14.5, libjs-underscore
Suggests: r-cran-testthat, r-cran-knitr
Filename: pool/universe/r/r-cran-v8/r-cran-v8_1.5-1_amd64.deb
Size: 301824
MD5sum: 4daf6d2a1519b20ae1ade180d74a8838
SHA1: 413de1e9cccc1f504000b84f5a4b6c678542b980
SHA256: 946c15c739b2cdf19f0edbd226a89e380ecbc8bd5b57244adde5653f4550d883
Homepage: https://cran.r-project.org/package=V8
Description-en: Embedded JavaScript Engine for R
 An R interface to Google's open source JavaScript engine.
 V8 is written in C++ and implements ECMAScript as specified in ECMA-262,
 5th edition. In addition, this package implements typed arrays as
 specified in ECMA 6 used for high-performance computing and libraries
 compiled with 'emscripten'.
Description-md5: b94ca5d24c7a9346a44c0d63937229cf


$ acsh uwsgi-plugin-v8
Package: uwsgi-plugin-v8
Architecture: amd64
Version: 2.0.15+10+0.0.3
Priority: extra
Section: universe/web
Source: uwsgi-plugin-v8 (0.0.3)
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: uWSGI packaging team <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 60
Depends: libc6 (>= 2.14), libgcc1 (>= 1:3.0), libstdc++6 (>= 4.1.1), libv8-3.14.5, uwsgi-abi-8ecc7b0491fca07eb2d7b0c9aaeb180f
Filename: pool/universe/u/uwsgi-plugin-v8/uwsgi-plugin-v8_2.0.15+10+0.0.3_amd64.deb
Size: 25292
MD5sum: 4acbbf106375e562bf7334ce7ea2d95c
SHA1: 7850bf86eb6d81105fd333085079741e61d0d606
SHA256: 27a7f591b3dcace6ad826d8578bdc36814b20e6c833bedf7e39be5a863916621
Homepage: https://uwsgi-docs.readthedocs.io/en/latest/
Description-en: JavaScript V8 plugin for uWSGI
 uWSGI presents a complete stack for networked/clustered web applications,
 implementing message/object passing, caching, RPC and process management.
 It is designed to be fully modular. This means that different plugins can be
 used in order to add compatibility with tons of different technology on top of
 the same core.
 .
 This package provides V8 plugin for uWSGI.
Description-md5: b911def1bbb742940a1e5f65e79771b3