feat: add gestureHandling attirbute to MapOptions

[jimulle]

The gestureHandling attribute in MapOptions controls how
gestures on the map are handled. The attribute takes one
of four string values (cooperative, greedy, none and auto).

Changes are not breaking, gestureHandling is an optional
attribute and the google maps api defaults this attribute to
'auto'.

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[sebholstein]

The gestureHandling is missing in the inputs configuration.

[sebholstein]

can we change it to this for better autocompletion?:

gestureHandling: 'cooperative'|'greedy'|'none'|'auto' = 'auto';

[jimulle]

I addressed the comments but I am now getting an issue with the webpack config when running the tests:

> karma start

12 03 2017 14:45:47.938:ERROR [preprocess]: Can not load "webpack"!
  WebpackOptionsValidationError: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration.entry should be one of these:
   object { <key>: non-empty string | [non-empty string] } | non-empty string | [non-empty string] | function
   The entry point(s) of the compilation.
   Details:
    * configuration.entry should NOT have less than 1 properties ({
        "keyword": "minProperties",
        "dataPath": ".entry",
        "schemaPath": "#/oneOf/0/minProperties",
        "params": {
          "limit": 1
        },
        "message": "should NOT have less than 1 properties",
        "schema": 1,
        "parentSchema": {
          "minProperties": 1,
          "additionalProperties": {
            "oneOf": [
              {
                "description": "The string is resolved to a module which is loaded upon startup.",
                "minLength": 1,
                "type": "string"
              },
              {
                "description": "All modules are loaded upon startup. The last one is exported.",
                "$ref": "#/definitions/common.nonEmptyArrayOfUniqueStringValues"
              }
            ]
          },
          "description": "Multiple entry bundles are created. The key is the chunk name. The value can be a string or an array.",
          "type": "object"
        },
        "data": {}
      }).
      object { <key>: non-empty string | [non-empty string] }
      Multiple entry bundles are created. The key is the chunk name. The value can be a string or an array.
    * configuration.entry should be a string.
    * configuration.entry should be an array:
      [non-empty string]
    * configuration.entry should be an instance of function
      function returning an entry object or a promise..
    at webpack (/Users/jimulle/Desktop/angular2-google-maps/node_modules/webpack/lib/webpack.js:19:9)
    at new Plugin (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma-webpack/lib/karma-webpack.js:63:18)
    at invoke (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:75:15)
    at Array.instantiate (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:59:20)
    at get (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:48:43)
    at /Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:71:14
    at Array.map (native)
    at Array.invoke (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:70:31)
    at Injector.get (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:48:43)
    at instantiatePreprocessor (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma/lib/preprocessor.js:55:20)
    at Array.forEach (native)
    at createPreprocessor (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma/lib/preprocessor.js:74:20)
    at Array.invoke (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:75:15)
    at get (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:48:43)
    at /Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:71:14
    at Array.map (native)
    at Injector.invoke (/Users/jimulle/Desktop/angular2-google-maps/node_modules/di/lib/injector.js:70:31)
    at Server.start (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma/lib/server.js:103:18)
    at Object.exports.run (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma/lib/cli.js:280:26)
    at Object.<anonymous> (/Users/jimulle/Desktop/angular2-google-maps/node_modules/karma/bin/karma:3:23)
    at Module._compile (module.js:556:32)
    at Object.Module._extensions..js (module.js:565:10)

START:
12 03 2017 14:45:47.974:INFO [karma]: Karma v1.3.0 server started at http://localhost:9876/
12 03 2017 14:45:47.975:INFO [launcher]: Launching browser Chrome with unlimited concurrency
12 03 2017 14:45:47.976:ERROR [karma]: Found 1 load error

[jimulle]

This is the same issue being reported by @demianh in his pull request: #923

[sebholstein]

@jimulle thx! Can you address the comments?

[sebholstein]

@jimulle the build process is now fixed. I will try to make the changes and merge your PR

[jimulle]

I will rebase and update the PR tonight

[sebholstein]

@jimulle I've done it for you 😃 changed some little details but your contribution remains.

[sebholstein]

thx for your time!