Updating documentation from sampleRate to sampleInterval. (#255)

After the change #254, documentations in this repository need update.

Author: arskama

CHANGES.md

@@ -73,6 +73,6 @@ function pressureCallback(update) {
   }
 }
 
-const observer = new PressureObserver(pressureCallback, { sampleRate : 1 });
+const observer = new PressureObserver(pressureCallback, { sampleInterval : 1000 });
 observer.observe('cpu');
 ```

HOWTO.md

@@ -29,8 +29,8 @@ function pressureObserverCallback(updates) {
   console.log("timestamp = " + updates[0].time);
 }
 
-// Create observer with 1s sample rate.
-observer = new PressureObserver(pressureObserverCallback, { sampleRate: 1 });
+// Create observer with 1000ms sample interval.
+observer = new PressureObserver(pressureObserverCallback, { sampleInterval: 1000 });
 
 // Start observer.
 await observer.observe("cpu");

README.md

@@ -273,7 +273,7 @@ function callback(entries) {
   console.log(`Current pressure ${lastEntry.state}`);
 }
 
-const observer = new PressureObserver(callback, { sampleRate: 1 });
+const observer = new PressureObserver(callback, { sampleInterval: 1000 }); // 1000ms
 await observer.observe("cpu");
 ```
 
@@ -356,7 +356,7 @@ function pressureChange(entries) {
   }
 }
 
-const observer = new PressureObserver(pressureChange, { sampleRate: 1 });
+const observer = new PressureObserver(pressureChange, { sampleInterval: 1000 });
 await observer.observe("cpu");
 ```