The ornamental design for a package, as shown and described.
FIG. 1 is a perspective view of a first package;
FIG. 2 is a front elevation plan view of the first package;
FIG. 3 is a rear elevation plan view of the first package;
FIG. 4 is a first side view of the first package;
FIG. 5 is a second side view of the first package;
FIG. 6 is a top view of the first package; and,
FIG. 7 is a bottom view of the first package.
The broken dashed lines showing in FIGS. 1, 2, and 4-6 are included for the purpose of illustrating portions of the package that form no part of the claimed design.