(v0.7) pkg> ?pin
pin pkg[=uuid] ...
Pin packages to given versions, or the current version if no version is
specified. A pinned package has its version fixed and will not be upgraded
or downgraded. A pinned package has the symbol ⚲ next to its version in the
So if you have Blink v0.6.2 and PlotlyJS v0.10.2 installed,