minor: use new eslint configuration file format

src/Command/Command.js

@@ -294,7 +294,7 @@ export default class Command extends implementationOf(CommandInterface) {
         try {
             this._application = application;
             this._fullDefinition = null;
-        } catch (e) {
+        } catch {
             // Do nothing...
         }
     }

src/Command/DumpCompletionCommand.js

@@ -40,7 +40,7 @@ class DumpCompletionCommand extends Command {
             fullCommand = (() => {
                 try {
                     return realpathSync(fullCommand);
-                } catch (_) {
+                } catch {
                     return null;
                 }
             })() || fullCommand;

src/Completion/CompletionInput.js

@@ -223,7 +223,7 @@ export default class CompletionInput extends ArgvInput {
     _parseToken(token, parseOptions) {
         try {
             return super._parseToken(token, parseOptions);
-        } catch (e) {
+        } catch {
             // Suppress errors, completed input is almost never valid
         }
 

src/Formatter/OutputFormatter.js

@@ -245,7 +245,7 @@ export default class OutputFormatter extends implementationOf(OutputFormatterInt
             } else {
                 try {
                     style.setOption(match[2]);
-                } catch (e) {
+                } catch {
                     return false;
                 }
             }