Catch \Throwable before \Exception

Some exceptions from PHP 7 are implementing \Throwable interface (see http://php.net/manual/en/language.errors.php7.php), so type/parse errors might not be caught with the current implementation.

Since this library supports PHP 5, we can implement multiple `catch()` blocks without breaking changes.

This PR makes sure that all kinds of errors & exceptions are caught, especially when getting authenticated user context from `FieldProvider` class.

Author: tzurbaev

src/Understand/UnderstandLaravel5/ExceptionEncoder.php

@@ -216,6 +216,8 @@ public function getCode($relativePath, $line, $linesAround = 6)
 
             return $codeLines;
         }
+        catch (\Throwable $e)
+        {}
         catch (\Exception $e)
         {}
     }

src/Understand/UnderstandLaravel5/FieldProvider.php

@@ -431,6 +431,8 @@ protected function getUserId()
                 return $userId;
             }
         }
+        catch (\Throwable $e)
+        {}
         catch (\Exception $e)
         {}
 
@@ -441,6 +443,8 @@ protected function getUserId()
                 return $user->id;
             }
         }
+        catch (\Throwable $e)
+        {}
         catch (\Exception $e)
         {}
 
@@ -451,6 +455,8 @@ protected function getUserId()
                 return $user->id;
             }
         }
+        catch (\Throwable $e)
+        {}
         catch (\Exception $e)
         {}
     }

src/Understand/UnderstandLaravel5/Logger.php

@@ -153,6 +153,10 @@ protected function send(array $event)
         {
             return $this->handler->handle($event);
         }
+        catch (\Throwable $e)
+        {
+            return false;
+        }
         catch (\Exception $ex)
         {
             return false;