[BUG] maxEdges isn't being correctly generalized over.

[semaraugusto]

Describe the bug When using a group with maxEdges == 7 the smart-contract and typescript interfaces don't properly generate the correct publicSignals to the verifyProof function on Semaphore.sol To Reproduce Setup variables:

    const chainID = BigInt(1099511629113) // Hardhat default TypedChainId
    const wasmFilePath20_8 = __dirname +
       `/../../solidity-fixtures/solidity-fixtures/${treeDepth}/8/semaphore_20_8.wasm`
    const witnessCalcPath20_8 = __dirname +
       `/../../solidity-fixtures/solidity-fixtures/${treeDepth}/8/witness_calculator.js`
    const zkeyFilePath20_8 = __dirname +
        `/../../solidity-fixtures/solidity-fixtures/${treeDepth}/8/circuit_final.zkey`

    const { identities, members } = createIdentities(Number(chainID), 3)
    const signal = "Hello world"
    const bytes32Signal = utils.formatBytes32String(signal)
    const groupId3 = 1338
    const maxEdges = 7
    const linkedGroup = new LinkedGroup(treeDepth, maxEdges)
    linkedGroup.addMember(members[0])

1. Create a group on Semaphore.sol: await semaphore.createGroup(groupId, treeDepth, adminAddr, maxEdges)
2. Add member to group: await semaphore.addMember(groupId, commitment)
3. Generate Proof of Membership:

   const fullProof = await generateProof(
       identities[0],
       linkedGroup,
       BigNumber.from(Date.now()),
       signal,
       chainID,
       {
         wasmFilePath: wasmFilePath20_8,
         zkeyFilePath: zkeyFilePath20_8
       }
     )
   const solidityProof = packToSolidityProof(fullProof.proof)

4. Call verifyProof on contract:

   
     const transaction = semaphore.contract.verifyProof(
       groupId3,
       bytes32Signal,
       fullProof.publicSignals.nullifierHash,
       fullProof.publicSignals.externalNullifier,
       createRootsBytes(fullProof.publicSignals.roots),
       solidityProof,
       { gasLimit: "0x5B8D80" }
     )

**Expected behavior**
Proof should be verified, but it's currently being reverted.

[dutterbutter]

Closed in https://github.com/webb-tools/semaphore-anchor/pull/10