update go to 1.13

Signed-off-by: bblfsh-release-bot <[email protected]>

add missing exp operators; fixes #91

Signed-off-by: Denys Smirnov <[email protected]>

update sdk to 3.2.4

Signed-off-by: bblfsh-release-bot <[email protected]>

update sdk and enable language aliases

Signed-off-by: Denys Smirnov <[email protected]>

switch to go modules

Signed-off-by: Denys Smirnov <[email protected]>

interpret offset as a utf-16 code units; fixes #71

Signed-off-by: Denys Smirnov <[email protected]>

update sdk version

Signed-off-by: Denys Smirnov <[email protected]>

update sdk version

Signed-off-by: Denys Smirnov <[email protected]>

Merge pull request #68 from bzz/fix-block-comments

Drop all comments for BlockStatement

Update README.md