bump src-d/go-onigoruma to v1.1.0

A result of:
```
go get github.com/src-d/go-onigoruma
go mod tidy
```

Signed-off-by: Alexander Bezzubov <[email protected]>

Author: bzz

go.mod

@@ -3,7 +3,7 @@ module github.com/src-d/enry/v2
 go 1.12
 
 require (
-	github.com/src-d/go-oniguruma v1.0.0
+	github.com/src-d/go-oniguruma v1.1.0
 	github.com/stretchr/testify v1.3.0
 	github.com/toqueteos/trie v1.0.0 // indirect
 	gopkg.in/toqueteos/substring.v1 v1.0.2

go.sum

@@ -2,8 +2,8 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/src-d/go-oniguruma v1.0.0 h1:JDk5PUAjreGsGAKLsoDLNmrsaryjJ5RqT3h+Si6aw/E=
-github.com/src-d/go-oniguruma v1.0.0/go.mod h1:chVbff8kcVtmrhxtZ3yBVLLquXbzCS6DrxQaAK/CeqM=
+github.com/src-d/go-oniguruma v1.1.0 h1:EG+Nm5n2JqWUaCjtM0NtutPxU7ZN5Tp50GWrrV8bTww=
+github.com/src-d/go-oniguruma v1.1.0/go.mod h1:chVbff8kcVtmrhxtZ3yBVLLquXbzCS6DrxQaAK/CeqM=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=