fix: Docs & Nuke.sh

Used Jeff's PR to find an additional place in the docs that needed to be updated and confirmed with DJ that the `--` should actually immediately follow `npm run lerna` (something he discovered when trying to do a release).

Updated `nuke`, as well.

CONTRIBUTING.md

@@ -39,7 +39,7 @@ TinaCMS uses [Lerna](https://lerna.js.org/) to manage dependencies when developi
 | npm run bootstrap                             | Install dependencies and link local packages. |
 | npm run build                                 | Build all packages.                           |
 | npm run test                                  | Run tests for all packages.                   |
-| npm run lerna run build -- --scope \<package> | Build only \<package>.                        |
+| npm run lerna -- run build --scope \<package> | Build only \<package>.                        |
 
 ### Testing With External Projects
 
@@ -97,7 +97,7 @@ Linking prevents running `npm install` from directly inside a package from worki
    You can use lerna to add new dependencies to a package from the root of the repository:
 
    ```
-   npm run lerna add react --scope react-cms
+   npm run lerna -- add react --scope react-cms
    ```
 
    The downside of this approach is you can only add one dependency at a time. If you need to add many packages, you can use the next method.
@@ -108,7 +108,7 @@ Linking prevents running `npm install` from directly inside a package from worki
 
 3. **When I run `npm run bs` it deletes the contents of a package?**
 
-   This sucks. Try running `npm run lerna clean` and then running `npm run bs` again.
+   This sucks. Try running `npm run lerna -- clean` and then running `npm run bs` again.
 
 ### Failed to Compile: Module not found: Can't resolve 'some-tinacms-package'
 

scripts/nuke.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Deletes all node_modules
-npm run lerna clean -y
+npm run lerna -- clean -y
 
 # rm -rf node_modules