add missing vitamins, minor tweak to peristaltic pump

This compiles, try:
`$ cargo run -- --repo ../modular-recipes/recipes/ peristaltic_pump`

modular-recipes/recipes/purchase/silicone_tubing.toml

@@ -0,0 +1,13 @@
+[outputs]
+silicone_tubing = {amount="3 m"}
+
+[inputs]
+capital={amount="18.75 usd"}
+
+[dependencies]
+operator = {skills=["vendor interaction"]}
+
+[action.purchase]
+vendor = [
+    "https://www.ebay.com/itm/134871649335"
+]