Update README.md

Author: rob-luke

README.md

@@ -8,7 +8,7 @@ Read [NIRX](https://nirx.net/) functional near-infrared spectroscopy files in Ju
 ## Installation
 
 ```julia
-Pkg.add("NIRX")
+] add NIRX
 ```
 
 
@@ -24,5 +24,5 @@ triggers, header_info, info, wl1, wl2, config = read_NIRX("path/to/your/data")
 
 Tests are automatically run on continuous integration servers, the icon above indicates if they are passing. To run the tests locally run...
 ```julia
-Pkg.test("NIRX")
+] test NIRX
 ```