fix(readme.md): incomplete usage

elaborates on usage with styled-components as well as advanced usage for generating parsers and
parsing other types of case conventions

Author: Tbhesswebber

README.md

@@ -4,14 +4,16 @@
 ![codecov](https://img.shields.io/codecov/c/github/Tbhesswebber/style-object-to-css-string.svg?logo=codecov&style=popout-square)
 ![Commitizen friendly](<https://img.shields.io/badge/commitizen-friendly-brightgreen.svg?style=popout-square&logo=travis&logoColor=rgba(0,0,0,0)>)
 
-This project was inspired by some work with the [:nail_care:styled components](https://www.styled-components.com/) library. In creating a component that I will never use, I needed to provide the consumer with a way to pass down styles that I can then merge into various component definitions above my own css rules.
+This project was inspired by some work with the [:nail_care:styled components](https://www.styled-components.com/) library. In creating a component that I will never use, I needed to provide the consumer with a way to pass down styles that I can then merge into various component definitions along with my own css rules.
 
-Just in case, this package also exposes the ability to generate additional syntax parsers that can then be used with the primary export or as stand-alone string parsing functions.
+Just in case, this package also exposes the ability to access or generate additional syntax parsers that can then be used with the primary export or as stand-alone string parsing functions.
 
 ## Usage
 
 ### Basic Usage
 
+#### Without styled-components
+
 ```javascript
 import styleToCss from 'style-obj-to-css-string';
 // I now regret my choice in package name
@@ -26,7 +28,52 @@ const styles = {
 const styleString = styleToCss(styles);
 /**
  * Generates all values as a single semicolon separated string
- * "display: flex;flex-direction: column;align-items: center;justify-content: center;"/
+ * "display: flex;flex-direction: column;align-items: center;justify-content: center;"
+ */
+```
+
+#### With :nail_care:styled-components
+
+```javascript
+import styled from 'styled-components';
+import styleToCss from 'style-obj-to-css-string';
+
+const StyledThingy = styled.p`
+  ${/* Place properties that you will allow to be overwritten here - typically stylistic properties */}
+  color: meduimaquamarine;
+  font-size: 1rem;
+  background-color: thistle;
+  ${props => props.styles && styleToCss(props.styles) /* we check for styles to avoid an invocation with undefined.  may be fixed with future pull requests. */}
+  ${/* Place properties that you will not allow to change here - typically structural properties */}
+  display: block;
+  margin: 1rem;
+  grid-column: 1 / -1;
+`;
+```
+
+### Advanced Usage
+
+This library can also be useful in parsing JSON from servers that might use other case-conventions. Simply bring in our list of `parsers` in your import or make your own with our `createParser` function!
+
+**parsers** - An object containing multiple parse methods.
+
+- parsers.snakeToKebab( str: string ): string - converts snake_case to kebab-case
+- parsers.camelToKebab( str: string ): string - converts camelCase to kebab-case
+
+**createParser** - A function that return a parsing function.
+
+- createParser(matcher: string | RegExp, replacer: Function): Function - generates a parser function as seen in parsers. Note: replacer uses the same syntax as the second parameter for [String.prototype.replace](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_function_as_a_parameter) (the first argument is the matched value)
+
+```javascript
+import styleToCss, { parsers, createParser } from 'style-to-css-string';
+import axios from 'axios';
+
+const kebabToCamel = createParser(/-[a-z]/, match => match.split('')[1].toUpperCase());
+
+async function getStyleObj(path) {
+  const style = await axios.get(path);
+  const styleString = styleToCss(style, parsers.snakeToKebab);
+}
 ```
 
 ## Contributing
@@ -51,6 +98,6 @@ $ npm run validate
 
 I use [commitlint](https://github.com/conventional-changelog/commitlint) to lint git commits according to the [conventional changelog](https://github.com/conventional-changelog/commitlint/blob/master/%40commitlint/config-conventional/README.md). If you're as lazy as I am, feel free to use [commitizen cli](https://github.com/commitizen/cz-cli) either with your own installation or with `npm run cz` - if your commit still fails commitlint's rules, you can run `npm run cz -- --retry`.
 
-#### :fire_engine:In Case of Emergency:fire_engine:
+#### :fire:In Case of Emergency:fire:
 
-Just in case something happens that forces you to run away from your computer screaming, just run `npm run fire`, which will create a new branch called "emergency", commit all of your current changes, and then push them to a new branch on your origin remote.
+Just in case something happens that forces you to run away from your computer screaming, just run `npm run fire`, which will create a new branch called "emergency", commit all of your current changes, and then push them to a new branch on your origin remote. :fire_engine: