The ornamental design for a set of eyelashdecals, as shown and described.
FIG. 1 is a front view of the set of eyelash decals.
FIG. 2 is a rear view of the claimed design.
FIG. 3 is a left side view of the claimed design.
FIG. 4 is a top view of the claimed design.
FIG. 5 is a bottom view of the claimed design; and,
FIG. 6 is a perspective view of the claimed design in which a particular pair of eyelash decals is affixed to eyelashes of an end user. It shall be noted that the end user is depicted in broken lines as environmental matter forming no part of the claimed design.