Release v1.3.1-1

[angus-c]

• Use visibility API instead of beforeunload (#158)
• Update dependency fusion-core to v1.10.1 (#168)

[old-fusion-bot]

Triggered Fusion.js build verification: https://buildkite.com/uberopensource/fusion-release-verification/builds/1276

[old-fusion-bot]

v1.3.1-0...angus-c:auto-release-1.3.1-1-sNvbpgDmZ

[codecov]

Codecov Report

Merging #173 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #173   +/-   ##
=======================================
  Coverage   84.47%   84.47%           
=======================================
  Files           7        7           
  Lines         161      161           
  Branches       25       25           
=======================================
  Hits          136      136           
  Misses         18       18           
  Partials        7        7

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ee6e1c6...400768f. Read the comment docs.