docs: fix typos (#1487)

README.md

@@ -21,7 +21,7 @@ fast in-memory access to the webpack assets.
 
 ## Getting Started
 
-First thing's first, install the module:
+First things first, install the module:
 
 ```console
 npm install webpack-dev-server --save-dev
@@ -106,7 +106,7 @@ question. Remember; It's always much easier to answer questions that include you
 If you're twitter-savvy you can tweet [#webpack][hash-url] with your question
 and someone should be able to reach out and lend a hand.
 
-If you have discovered a :bug:, have a feature suggestion, of would like to see
+If you have discovered a :bug:, have a feature suggestion, or would like to see
 a modification, please feel free to create an issue on Github. _Note: The issue
 template isn't optional, so please be sure not to remove it, and please fill it
 out completely._