At the moment, the examples produce warnings, due to the very old format
they use.
This commit re-encrypts the example files to eliminate the warnings that
are occurring from the use of the very old sops format.
Commit e9b9f7aeef generated new PGP keys
for this repository, but failed to update the keys used by the examples.
As a result, the documentation for testing with the dev pgp key does not
work.
This commit rekeys the examples using the newly generated examples,
which allows the testing to work again.
**IMPORTANT** This breaks compatibility of the file format in 1.x for
json files, due to the version being encoded as a number in json files.
The fix for this is easy, however. One can either use a previous version
of sops in the range [2.0.0, 2.0.9] to edit the file, or one can manually edit
the encrypted file and change the version from a number to a string
Previously we basically hand-converted the metadata struct into a map
which we then passed to the stores. Now, we convert the metadata struct
to a "serialization" struct, which the stores serialize
