Update CODEOWNERS (#3280)

* Update CODEOWNERS

* Reduce @cclauss notifications during Hacktoberfest
Co-authored-by: NChristian Clauss <cclauss@me.com>

.github/CODEOWNERS

@@ -7,11 +7,7 @@
 
 # Order is important. The last matching pattern has the most precedence.
 
-/.travis.yml  @cclauss @dhruvmanila
-
-/.pre-commit-config.yaml  @cclauss @dhruvmanila
-
-/.github/  @cclauss
+/.*  @cclauss @dhruvmanila
 
 # /arithmetic_analysis/
 
@@ -25,17 +21,17 @@
 
 # /cellular_automata/
 
-/ciphers/  @cclauss
+# /ciphers/  @cclauss  # TODO: Uncomment this line after Hacktoberfest
 
 # /compression/
 
 # /computer_vision/
 
-/conversions/  @cclauss
+# /conversions/  @cclauss  # TODO: Uncomment this line after Hacktoberfest
 
-/data_structures/  @cclauss
+# /data_structures/  @cclauss  # TODO: Uncomment this line after Hacktoberfest
 
-# /digital_image_processing/
+/digital_image_processing/ @mateuszz0000
 
 # /divide_and_conquer/
 
@@ -71,7 +67,7 @@
 
 # /neural_network/
 
-/other/  @cclauss
+# /other/  @cclauss  # TODO: Uncomment this line after Hacktoberfest
 
 /project_euler/  @dhruvmanila @Kush1101
 
@@ -83,9 +79,9 @@
 
 # /searches/
 
-# /sorts/
+/sorts/ @mateuszz0000
 
-/strings/  @cclauss
+# /strings/  @cclauss  # TODO: Uncomment this line after Hacktoberfest
 
 # /traversals/