Fixed typos in JSON ABI formatting (ethers-io#1275).

Author: ricmoo

packages/abi/src.ts/fragments.ts

@@ -720,7 +720,7 @@ export class ConstructorFragment extends Fragment {
             return JSON.stringify({
                 type: "constructor",
                 stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability: undefined),
-                payble: this.payable,
+                payable: this.payable,
                 gas: (this.gas ? this.gas.toNumber(): undefined),
                 inputs: this.inputs.map((input) => JSON.parse(input.format(format)))
             });
@@ -817,10 +817,10 @@ export class FunctionFragment extends ConstructorFragment {
                 name: this.name,
                 constant: this.constant,
                 stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability: undefined),
-                payble: this.payable,
+                payable: this.payable,
                 gas: (this.gas ? this.gas.toNumber(): undefined),
                 inputs: this.inputs.map((input) => JSON.parse(input.format(format))),
-                ouputs: this.outputs.map((output) => JSON.parse(output.format(format))),
+                outputs: this.outputs.map((output) => JSON.parse(output.format(format))),
             });
         }