diff --git a/.editorconfig b/.editorconfig
index 2aa42c92..411cd265 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -15,5 +15,5 @@ end_of_line = crlf
 insert_final_newline = false
 trim_trailing_whitespace = false
 
-[*.{conf,src,config,markdown}]
+[*.{conf,src,config,markdown,yml}]
 indent_style = space
diff --git a/.travis.yml b/.travis.yml
index 766773b8..77106c4c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,15 @@
+sudo: false
 language: erlang
-otp_release:
-  - 22.0
-  - 21.3
-  - 20.3
-  - 19.3
-  - 18.3
+
+matrix:
+  include:
+    - otp_release: 22.0
+    - otp_release: 21.3
+    - otp_release: 20.3
+    - otp_release: 19.3
+    - otp_release: 18.3
+      dist: trusty
 script:
   - make test
   #- make xref
-  - make dialyze
\ No newline at end of file
+  - make dialyze
diff --git a/src/rebar.lock b/src/rebar.lock
deleted file mode 100644
index 57afcca0..00000000
--- a/src/rebar.lock
+++ /dev/null
@@ -1 +0,0 @@
-[].