chore(README): fix typo

Author: zzmp

README.md

@@ -80,7 +80,7 @@ $ npm test
 
 ##### Contributing
 
-In lieu of a formal style guide, pleae take good care to maintain the existing coding style.
+In lieu of a formal style guide, please take good care to maintain the existing coding style.
 Add unit tests for any new or changed functionality. Lint and test your code using [Grunt](http://gruntjs.com/).
 Please refer to this [document][commit-message-format] for a detailed explanation of git commit guidelines - source: [AngularJS](https://angualrjs.org)
 [commit-message-format]: https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#
@@ -387,4 +387,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.