Replace deprecated $.bind with $.on

[cdrini]

Not really a blocker or anything, but nice to have in case we ever try to update from jquery 1 :/

[codecov[bot]]

Codecov Report

Merging #519 into master will decrease coverage by 1.71%. The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master     #519      +/-   ##
==========================================
- Coverage   62.62%   60.90%   -1.72%     
==========================================
  Files          36       36              
  Lines        3743     3745       +2     
  Branches      713      713              
==========================================
- Hits         2344     2281      -63     
- Misses       1129     1183      +54     
- Partials      270      281      +11     

Impacted Files	Coverage Δ
src/js/BookReader/utils.js	84.21% <0.00%> (ø)
src/js/plugins/plugin.archive_analytics.js	28.12% <0.00%> (ø)
src/js/plugins/plugin.chapters.js	32.22% <0.00%> (-45.56%)	:arrow_down:
src/js/plugins/plugin.vendor-fullscreen.js	56.81% <0.00%> (ø)
src/js/BookReader.js	67.59% <80.00%> (+0.04%)	:arrow_up:
src/js/BookReader/Mode2Up.js	49.42% <100.00%> (ø)
src/js/BookReader/Navbar/Navbar.js	89.28% <100.00%> (ø)
src/js/plugins/plugin.autoplay.js	72.22% <100.00%> (ø)
src/js/plugins/plugin.iframe.js	64.28% <100.00%> (ø)
src/js/plugins/plugin.mobile_nav.js	43.52% <100.00%> (-25.89%)	:arrow_down:
... and 5 more

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