packagesuppliers/filesystem.d: Only glob versions of a package_id

When looking for versions of a package don't include other packages
that start with the same name as the queried package. This is done
by requiring that the first character after the - is a digit.

If a directory contains the files botan-1.zip and botan-math-2.zip
the current implementation would report both 1 and math-2 as
candidates followed by an error that math-2 is not a valid version.

Signed-off-by: Andrei Horodniceanu <[email protected]>

source/dub/packagesuppliers/filesystem.d

@@ -27,7 +27,7 @@ class FileSystemPackageSupplier : PackageSupplier {
 		import std.file : dirEntries, DirEntry, SpanMode;
 		import std.conv : to;
 		Version[] ret;
-		foreach (DirEntry d; dirEntries(m_path.toNativeString(), package_id~"*", SpanMode.shallow)) {
+		foreach (DirEntry d; dirEntries(m_path.toNativeString(), package_id~"-[0123456789]*", SpanMode.shallow)) {
 			NativePath p = NativePath(d.name);
 			logDebug("Entry: %s", p);
 			enforce(to!string(p.head)[$-4..$] == ".zip");