Update vendored GSON dependency to latest available version

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 4.X.X (TBD)
+
+* Update vendored GSON dependency to latest available version
+ [#415](https://github.com/bugsnag/bugsnag-android/pull/415)
+
 ## 4.10.0 (2019-01-07)
 
 * Improve kotlin support by allowing property access

sdk/src/main/java/com/bugsnag/android/JsonScope.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bugsnag.android;
+
+/**
+ * Lexical scoping elements within a JSON reader or writer.
+ *
+ * @author Jesse Wilson
+ * @since 1.6
+ */
+@SuppressWarnings("all")
+final class JsonScope {
+
+    /**
+     * An array with no elements requires no separators or newlines before
+     * it is closed.
+     */
+    static final int EMPTY_ARRAY = 1;
+
+    /**
+     * A array with at least one value requires a comma and newline before
+     * the next element.
+     */
+    static final int NONEMPTY_ARRAY = 2;
+
+    /**
+     * An object with no name/value pairs requires no separators or newlines
+     * before it is closed.
+     */
+    static final int EMPTY_OBJECT = 3;
+
+    /**
+     * An object whose most recent element is a key. The next element must
+     * be a value.
+     */
+    static final int DANGLING_NAME = 4;
+
+    /**
+     * An object with at least one name/value pair requires a comma and
+     * newline before the next element.
+     */
+    static final int NONEMPTY_OBJECT = 5;
+
+    /**
+     * No object or array has been started.
+     */
+    static final int EMPTY_DOCUMENT = 6;
+
+    /**
+     * A document with at an array or object.
+     */
+    static final int NONEMPTY_DOCUMENT = 7;
+
+    /**
+     * A document that's been closed and cannot be accessed.
+     */
+    static final int CLOSED = 8;
+}

sdk/src/main/java/com/bugsnag/android/JsonStream.java

@@ -69,7 +69,7 @@ public void value(@NonNull File file) throws IOException {
         }
 
         super.flush();
-        beforeValue(false); // add comma if in array
+        beforeValue(); // add comma if in array
 
         // Copy the file contents onto the stream
         Reader input = null;