Add OTP21 to supported versions and travis

.travis.yml

@@ -2,10 +2,11 @@ language: erlang
 sudo: false
 otp_release:
 # Test on all the latest releases for the major versions supported as specified by the `require_otp_vsn` in rebar.config
-   - 21.0
-   - 20.0
+   - 22.2
+   - 21.3
+   - 20.3
    - 19.3
-   - 18.0
+   - 18.3
    - 17.4
    - R16B03-1
 

rebar.config

@@ -2,7 +2,7 @@
 
 %% accept R15B02.., any R16B except R16B03
 %% also accept OTP v17, altough it may not work properly on that release yet..
-{require_otp_vsn, "R15B0[^1]|R16B$|R16B[^0]|R16B0[^3]|R16B03-1|17|18|19|20|21"}.
+{require_otp_vsn, "R16B$|R16B[^0]|R16B0[^3]|R16B03-1|17|18|19|20|21|22"}.
 
 {erl_opts, [debug_info]}.
 {yrl_opts, [{includefile, "include/erlydtl_preparser.hrl"}]}.