Fix tests (#20)

autogpt/db.py

@@ -29,7 +29,7 @@ class TaskModel(Base):
 
     task_id = Column(Integer, primary_key=True, autoincrement=True)
     input = Column(String)
-    additional_input = Column(String)
+    additional_input = Dict
 
     artifacts = relationship("ArtifactModel", back_populates="task")
 

autogpt/schema.py

@@ -50,6 +50,7 @@ class StepOutput(BaseModel):
 class TaskRequestBody(BaseModel):
     input: str = Field(
         ...,
+        min_length=1,
         description="Input prompt for the task.",
         example="Write the words you receive to the file 'output.txt'.",
     )