Remove inline `<b>` markup

[binh-dam-ibigroup]

Inline <b>, <i>, <u> markup should be converted to <span className="..."> tags with css styling, or to styled elements.
Refs: #38, #60, #7

[fpurcell]

Places (after 0.0.15 -- Feb 21, 2020) where is used:

packages/itinerary-body/src/place-row.js
packages/printable-itinerary/src/access-leg.js
packages/printable-itinerary/src/index.js
packages/printable-itinerary/src/tnc-leg.js
packages/printable-itinerary/src/transit-leg.js
packages/stops-overlay/src/stop-marker.js
packages/trip-details/src/index.js