add missing vitamins, minor tweak to peristaltic pump

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

modular-recipes/recipes/peristaltic-pump/pump_housing_rear_with_stepper.toml

@@ -0,0 +1,14 @@
+[outputs]
+pump_housing_rear_with_stepper = {quantity=1}
+
+[inputs]
+pump_housing_rear = {version=0.1, quantity=1}
+m4_5_shcs = {quantity=2}
+stepper_28byj_48={quantity=1}
+
+[dependencies]
+tools = [ "3 mm hex driver" ]
+operator = {skills=["assembly"]}
+
+[action]
+process = """Screw the stepper to the printed rear housing."""