chore(swap): generated snapshots

contract/test/snapshots/test-swap-wallet.js.md

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+# Snapshot report for `test/test-swap-wallet.js`
+
+The actual snapshot is saved in `test-swap-wallet.js.snap`.
+
+Generated by [AVA](https://avajs.dev).
+
+## basic swap
+
+> alice makes offer
+
+    {
+      id: 'alice-swap-1',
+      invitationSpec: {
+        instance: Object @Alleged: InstanceHandle {},
+        invitationArgs: [
+          [
+            Object @Alleged: BLD issuer {},
+            Object @Alleged: ZDEFAULT issuer {},
+          ],
+        ],
+        publicInvitationMaker: 'makeFirstInvitation',
+        source: 'contract',
+      },
+      offerArgs: {
+        addr: 'agoric1jack',
+      },
+      proposal: {
+        give: {
+          Fee: {
+            brand: Object @Alleged: ZDEFAULT brand {},
+            value: 1n,
+          },
+          MagicBeans: {
+            brand: Object @Alleged: ZDEFAULT brand {},
+            value: 5n,
+          },
+        },
+        want: {
+          Cow: {
+            brand: Object @Alleged: BLD brand {},
+            value: 10n,
+          },
+        },
+      },
+    }
+
+> jack makes offer
+
+    {
+      id: 'jack-123',
+      invitationSpec: {
+        description: 'matchOffer',
+        instance: Object @Alleged: InstanceHandle {},
+        source: 'purse',
+      },
+      proposal: {
+        give: {
+          Cow: {
+            brand: Object @Alleged: BLD brand {},
+            value: 10n,
+          },
+        },
+        want: {
+          MagicBeans: {
+            brand: Object @Alleged: ZDEFAULT brand {},
+            value: 5n,
+          },
+        },
+      },
+    }