Update travis

tests/expected_json/backdoor.backdoor.json

@@ -9,7 +9,7 @@
                 6,
                 7
             ],
-            "start": 42
+            "start": 43
         },
         "vuln": "backdoor"
     }

tests/expected_json/backdoor.suicidal.json

@@ -11,7 +11,7 @@
                 6,
                 7
             ],
-            "start": 42
+            "start": 43
         },
         "vuln": "SuicidalFunc"
     }

tests/expected_json/locked_ether.locked-ether.json

@@ -13,7 +13,7 @@
                     5,
                     6
                 ],
-                "start": 46
+                "start": 47
             }
         ],
         "vuln": "LockedEther"

tests/expected_json/pragma.0.4.24.pragma.json

@@ -11,7 +11,7 @@
             },
             {
                 "filename": "tests/pragma.0.4.24.sol",
-                "length": 23,
+                "length": 24,
                 "lines": [
                     1
                 ],
@@ -19,8 +19,8 @@
             }
         ],
         "versions": [
-            "0.4.24",
+            "^0.4.23",
-            "^0.4.23"
+            "^0.4.24"
         ],
         "vuln": "ConstantPragma"
     }

tests/expected_json/unused_state.unused-state.json

@@ -9,7 +9,7 @@
                 "lines": [
                     4
                 ],
-                "start": 41
+                "start": 42
             }
         ],
         "unusedVars": [