Advancements not updated in 1.14 snapshots

The bug

Due to new content added in recent snapshots, some of the advancements require updating, however the following have not been and require it:

"A Balanced Diet" should have Suspicious Stew and Sweet Berries. ^{Fixed in 19w11a}
→ File: husbandry/balanced_diet.json

"How Did We Get Here" should have the Bad Omen effect. ^{Fixed in 19w11a}
→ File: nether/all_effects.json

"Two by Two" should have foxes. ^{Fixed in 19w12a}
→ File: husbandry/bred_all_animals.json

"The Parrots and the Bats" should have foxes. ^{Fixed in 19w11a}
→ File: husbandry/breed_an_animal.json