Pass test suite instance to #start_suite

src/spectator/formatters/default_formatter.cr

@@ -13,7 +13,7 @@ module Spectator::Formatters
     ERROR_CHAR   = 'E'.colorize(ERROR_COLOR)
     PENDING_CHAR = '*'.colorize(PENDING_COLOR)
 
-    def start_suite
+    def start_suite(suite : TestSuite)
     end
 
     def end_suite(report : Report)

src/spectator/formatters/formatter.cr

@@ -10,7 +10,7 @@ module Spectator::Formatters
   # Steps 2 and 3 are called for each example in the suite.
   abstract class Formatter
     # Called when a test suite is starting to execute.
-    abstract def start_suite
+    abstract def start_suite(suite : TestSuite)
 
     # Called when a test suite finishes.
     # The results from the entire suite are provided.

src/spectator/runner.cr

@@ -11,7 +11,7 @@ module Spectator
     # and invoke the formatter to output results.
     def run : Nil
       # Indicate the suite is starting.
-      @config.formatter.start_suite
+      @config.formatter.start_suite(@suite)
 
       # Run all examples and capture the results.
       results = [] of Result