test: fix false positive tests (#89)

Author: ascandone

internal/interpreter/testdata/script-tests/balance-not-found.num.specs.json

@@ -4,7 +4,8 @@
       "it": "-",
       "balances": {
         "a": {}
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/empty-postings.num.specs.json

@@ -6,7 +6,8 @@
         "foo": {
           "GEM": 0
         }
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/experimental/mid-script-function-call/expr-in-var-origin.num.specs.json

@@ -4,7 +4,8 @@
   ],
   "testCases": [
     {
-      "it": "-"
+      "it": "-",
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/experimental/overdraft-function/overdraft-function-when-positive.num.specs.json

@@ -9,7 +9,8 @@
         "acc": {
           "EUR/2": 100
         }
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/experimental/overdraft-function/overdraft-function-when-zero.num.specs.json

@@ -7,7 +7,8 @@
       "it": "-",
       "balances": {
         "acc": {}
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/negative-max-send-all.num.specs.json

@@ -6,7 +6,8 @@
         "src": {
           "USD/2": 0
         }
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/send-all-when-negative.num.specs.json

@@ -6,7 +6,8 @@
         "users:001": {
           "USD/2": -100
         }
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/send-allt-max-when-no-amount.num.specs.json

@@ -7,7 +7,8 @@
         "src1": {
           "USD/2": 0
         }
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/send-zero.num.specs.json

@@ -4,7 +4,8 @@
       "it": "-",
       "balances": {
         "src": {}
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}

internal/interpreter/testdata/script-tests/zero-postings-explicit-allotment.num.specs.json

@@ -5,7 +5,8 @@
       "balances": {
         "a": {},
         "b": {}
-      }
+      },
+      "expect.postings": []
     }
   ]
-}
+}