Fix code deprecations issues

Need to resolve this errors for drupal 10 compatibility.

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  Line   src/Tests/NodeViewCountBaseFunctionalityTest.php                       
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  117    Call to deprecated method assertRaw() of class                         
         Drupal\nodeviewcount\Tests\NodeViewCountBaseFunctionalityTest:         
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->responseContains() instead.   
  130    Call to deprecated method assertNoRaw() of class                       
         Drupal\nodeviewcount\Tests\NodeViewCountBaseFunctionalityTest:         
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->responseNotContains() instead.               
  156    Call to deprecated method assertRaw() of class                         
         Drupal\nodeviewcount\Tests\NodeViewCountBaseFunctionalityTest:         
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->responseContains() instead.                                                             
  175    Call to deprecated method assertNoRaw() of class                       
         Drupal\nodeviewcount\Tests\NodeViewCountBaseFunctionalityTest:         
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->responseNotContains() instead.               
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  Line   src/Tests/NodeViewCountSettingsFormTest.php                            
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  23     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                   
  24     Call to deprecated method assertNoFieldChecked() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxNotChecked() instead.                
  25     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                   
  26     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                   
  27     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                   
  28     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                   
  29     Call to deprecated method assertNoFieldChecked() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxNotChecked() instead.                
  33     Call to deprecated method assertNoFieldChecked() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxNotChecked() instead.                
  34     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.                                                                  
  52     Call to deprecated method assertFieldChecked() of class                
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                      
         in drupal:8.2.0 and is removed from drupal:10.0.0. Use                 
           $this->assertSession()->checkboxChecked() instead.        
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  Line   src/Tests/NodeViewCountViewsTest.php                                 
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  43     Call to deprecated method assertFieldByXPath() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                    
         in drupal:8.3.0 and is removed from drupal:10.0.0. Use               
           $this->xpath() instead and check the values directly in the test.  
  44     Call to deprecated method assertFieldByXPath() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                    
         in drupal:8.3.0 and is removed from drupal:10.0.0. Use               
           $this->xpath() instead and check the values directly in the test.  
  59     Call to deprecated method assertFieldByXPath() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                    
         in drupal:8.3.0 and is removed from drupal:10.0.0. Use               
           $this->xpath() instead and check the values directly in the test.  
  60     Call to deprecated method assertFieldByXPath() of class              
         Drupal\nodeviewcount\Tests\NodeViewCountTestBase:                    
         in drupal:8.3.0 and is removed from drupal:10.0.0. Use               
           $this->xpath() instead and check the values directly in the test.
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