Improve error messages (#1605)
Improve error messages (#1605)

Before:

    $ brunch b
    29 Dec 14:22:58 - error: Compiling of app/test.js failed. SyntaxError: app/test.js: super() is only allowed in a derived constructor
      2 |   constructor() {
      3 |     this.foo = 1
    > 4 |     super()
        |     ^
      5 |   }
      6 | }
      7 |
    29 Dec 14:22:58 - error: Compiling of app/test.scss failed. Error: Invalid CSS after "  background-color": expected "}", was ": white"
            on line 3 of app/test.scss
    >>   background-color: white
       --^

    29 Dec 14:22:58 - info: compiled in 815 ms

After:

    $ brunch b
    29 Dec 14:21:48 - error: Compiling of app/test.scss failed.

       Error: Invalid CSS after "  background-color": expected "}", was ": white"
               on line 3 of app/test.scss
       >>   background-color: white
          --^

    29 Dec 14:21:48 - error: Compiling of app/test.js failed.

       SyntaxError: app/test.js: super() is only allowed in a derived constructor
         2 |   constructor() {
         3 |     this.foo = 1
       > 4 |     super()
           |     ^
         5 |   }
         6 | }
         7 |

    29 Dec 14:21:48 - info: compiled in 795 ms
rlugojr/brunch,brunch/brunch,PeterDaveHello/brunch,hellyeahllc/brunch