Run local dev dependency with npm bin

README.md

@@ -22,10 +22,19 @@ $ npm install --save-dev solidity-coverage
 ```
 
 ### Run
+
+#### Option 1
+
 ```
 $ ./node_modules/.bin/solidity-coverage
 ```
 
+#### Option 2
+
+```
+$ $(npm bin)/solidity-coverage
+```
+
 Tests run significantly slower while coverage is being generated. Your contracts are double-compiled
 and a 1 to 2 minute delay between the end of the second compilation and the beginning of test execution
 is possible if your test suite is large. Large Solidity files can also take a while to instrument.